[galdosdi]

Rent vs Buy definitely is geography-based. The number to compare against rent is mortgage - principal + expenses, and in some places that's much less than rent, in others it's similar, and in others it's much more.

In places where it's much more, buying is a bad idea (unless you're really committed to living there forever and are really committed to speculating that prices will only even go much higher there -- but that's taking on a huge risk, not decreasing it).

Remember, you can always just SAVE the money you would have put towards mortgage principal. Sure, with a mortgage after 30 years you have a house free and clear. But at the same price, a renter who saved the money that would have gone towards mortgage principal still ends up with a pile of money after 30 years -- a pile that is probably more diversified rather than being all in one single asset correlated to a single metro region's economy. I mean, who knows if the area I buy in will still be popular in 30 years?