| Fellow SF renter here. I've also done the DCF analysis and found that it's about a wash assuming a 10% discount rate and 10-year rent vs. buy-then-sell-with-payoff. One problem with your analysis is that I think anti-rent control sentiment is growing in SF as the city's politics moderate overall. You could very well get Ellised out of your place and then the entire analysis goes out the window (though I suppose you could probabalistically factor this in, including the Ellis payment, but then, you really should work on Wall Street building option and mortgage payout models, shouldn't you) A few interesting observations from the DCF: (1) In expensive markets like SF, the mortgage interest break is a huge deal. Consider that most buyers will be in a pretty high marginal bracket, CA has obscenely high taxes, and you'll be paying a ton of mortgage interest on a $1MM+ loan. (2) Not surprising, but your inflation/growth estimates for price vs. rent are the most important parameters. I don't think anyone could've foreseen the 10% year-over-year growth we've had for the better part of the last 5 years in rent. You just can't foresee everything in a model. (And to be perfectly honest, I can't stand the smugness of the luck-masquerading-as-skill crowd these days. Because sure, you "just knew" Google was going to be huge when you worked at some random startup back in 1998. And you "just knew" housing would go up like it has.) (3) I really buy the "forced savings" argument. Sure, you could theoretically do better running a "lean" operation and investing, but do most people have the discipline to do it? I might, and I certainly am now, but I'm not sure. Getting locked-in with a payment you know you MUST make is a powerful psychological anchor that might change behavior around, say, buying a new car, or a vacation, vs some abstract and sort of arbitrary savings goal. |