[Retric]

Interest is only part of the cost of a loan you also need to pay principle if you don't have a large down payment your interest rate increases. Feel free to calculate a 900k home w/ 0.8% property taxes and insurance. http://www.bankrate.com/calculators/mortgages/mortgage-payme...

You do get to deduct interest, but you lose out on the standard deduction you can also play a lot of games with savings. Things like not taking a car loan because use can pay with after tax money saving on the loan and paying less for the car. Financing your own credit card saves money where if your house poor debt is just a fact of life etc. You can also more safely have a high deductible health insurance.

Also, you get interest on savings so your not saving 50k per year to get 500k in 10 years.

[dpark]

I'm quite painfully aware of what a $1MM mortgage costs with taxes and insurance. The point is that if you can save enough to put down half of that in 10 years, you could swing the cost of the mortgage today. When you talk about saving, you have to remember that 1) you still have to live somewhere, and that's definitely not free, and 2) home prices are generally increasing over time so you probably need to save more than you think. On the subject of the standard deduction, you're right that you'd lose that, but with a jumbo mortgage, you'll still come out ahead for many years.

Interest on savings is negligible. If you take the highest money market rates, you'll get just north of 1%. If you stick the money in a 5-year CD, you'll get 2% and lower liquidity. Meanwhile the housing market is rising faster (how long that's sustainable is unknown).

I'm not sure what you're talking about with the car loan. If you think it's worth having a cushion of cash in the bank (I certainly think so) so that you can do things like buy your cars in cash, then saving for 10 years so that you can dump all the money into the house is a terrible idea because you've just lost your cash cushion. (Your best bet for saving on cars is to just buy fewer of them anyway.) For the high-deductible insurance, you only need a few thousand in the bank to take the risk out of that. You need enough cash on hand to cover your deductible. After that it basically looks like any other insurance plan. And certainly, a larger cash cushion makes copay/coinsurance easier to handle, but that's not specific to high-deductible insurance.

If you think you should live far beneath your means as a general rule, I can't argue with that. There's no compelling argument for why you should spend all your money if you have the option to save. It insulates you from risk and allows you to retire sooner if that's your goal. But if you are living far beneath your means so that you can just dump all your savings into a house in 10 years that you could afford today with the same income, I think you're wasting your time, especially in a market like SF where home prices are increasing so rapidly.

[Retric]

The car comment is people see 0% interest loans for a car and think they are not paying interest. However, if you have cash for the car out of pocket you can pay a lower purchase price. Because it's money saved you don't pay taxes on your 'earnings'. Which means it can be a very high ROI investment vs. that loan. Not that you should be buying a car but sometime over 10 years a new / used car is reasonable.

Also, I am basically assuming your going to get raises over time. So your initial 100k salary might be 150k in 10 years. Thus ~35k savings in your first year + 4% net interest (inducing things like that car loan) and cost dollar averaging etc and 4% more savings next year = 500k at the end.

As to housing prices, they might go up or stall. But, because your not in the market you can time things to buy when the market dips. Further, rent control means renting is divorced from increasing housing price changes so you gain a lot of the upside with fixed payments even if prices increase without the downside. Further, if prices fall you can rent somewhere else.

The truth is people are rarely going to do this, but people are also rarely going to hit big money from a startup.

[dpark]

> The car comment is people see 0% interest loans for a car and think they are not paying interest. However, if you have cash for the car out of pocket you can pay a lower purchase price.

This is all hypothetical and a really bad plan for increasing your overall wealth. Car manufacturers are the ones who subsidize the loans. If you see a 0% loan, it's not the dealer who's giving you that, so it's entirely likely that paying in cash will save you nothing. Those 0% loans are also for new cars (I've never seen them for used cars) and if you need to save a few dollars, buying used will do far more for you anyway.

> Thus ~35k savings in your first year + 4% net interest (inducing things like that car loan)

You can't just assert 4% interest and hand-wave it away with "things like that car loan". That's double the interest you'd get on the best 5-year CDs. So somewhere you need to account for that extra 2% interest and how it's going to compound for 10 years. You aren't buying a car every year even if that somehow would double your effective interest. Also, if you buy a car outright, it's presumably coming out of that 35k anyway. So no, your numbers still do not work.

> As to housing prices, they might go up or stall. But, because your not in the market you can time things to buy when the market dips.

Good luck with that. Timing the market is a really bad bet. There's no guarantee that the market will dip during the next 10 years. It could maintain growth for 15 years, or plateau after 5, or crash in 1 year (while you're still saving) but rebound and keep growing for another two decades after that. There's also no guarantee that it won't dip 20% as soon as you decide you're buying at the bottom.

> Further, rent control means renting is divorced from increasing housing price changes so you gain a lot of the upside with fixed payments even if prices increase without the downside. Further, if prices fall you can rent somewhere else.

Lots of places don't have rent control. Also, rent control might help your rent stay "low" (it's definitely not actually low in the bay) but it won't make buying more attainable. Again, if you want to rent because you think it's a better strategy than buying, go ahead. But renting while you try to save a half million in cash to buy a house seems like a really bad strategy. Saving aggressively is generally a good idea. If your goal is homeownership, though, saving to buy in cash has not looked like a good strategy since the government started incentivizing mortgage loans.

[Retric]

Nothing says you need to buy in exactly 10 years. If your in a rent controlled apartment you get to ratchet down if things get cheaper or stay out. Get a great offer somewhere else, move without the overhead of selling at a huge loss. It's effectivly a hedge.

As to ROI the car thing saves you around 6% meaning you need less than 4% from everything else to average out. Other options including dividend stocks are very likely to provide 4+% over 10 years ex Coca Cola. Is that 100% well no, but you can also make well over 4%. 450k or 650k is not a major issue vs. being yet another person who pasts on HN 10 years in startups and nothing to show for it.

Much like risking buying a house for the market to drop 40% in 10 years.

[dpark]

I think the core problem causing disagreement here is that you are not consistent or clear with what your goal is. Do you want flexibility? Low risk? Then rent. Do you want to own a home? Then buy. But decide what you want and then figure out how best to get there. You're starting with the assertion that the goal should be 500k in the bank but then abandoning that goal at some arbitrary point in the future when you'll suddenly dump that into a house. What do you actually want? Half a million in the bank as a safety cushion? Then you should not put that into a house at any time. Do you want a house? Then you probably shouldn't wait until you've saved an arbitrary half million dollars.

I don't know where you're getting the 6% number for buying a car in cash. That's definitely not going to happen. You could get a car loan at a better rate than that from a bank and pay the dealer in cash. Bankrate.com is showing me a rate below 3% for financing a new car over 5 years.

Your belief that you can do better than 4% in the market is exactly why it does not make sense to save and buy a house in cash. If you have 500k in cash and have the option to dump it into a house or dump it into the stock market, and you believe the stock market will perform significantly better than real estate, then you are wasting money by dumping it into the house. If you believe you can get, say, 6% in the stock market, then taking out a mortgage at 4% lets you earn 2% extra each year.

[Retric]

Reading though this thread I have been justifying my statements and backing into an odd corner.

Buying a house was an example of a life changing thing you could do with 500k even with a six figure job. And no you can't buy a house at 100k with zero savings in the bay.

Sure, that's true long before you randomly hit ~500k, but that was chosen as a 'good' return from joining a startup that does not become Google as a non founder.

PS: As to returns, if you can't get 4+% retirement get's a lot harder. 1.04 ^ 40 = 4.8x So, 10% is not even close to cutting it. At 2% forget about it. Best of luck.