That's a lot of analysis. I couldn't hang on that long because OP had so many arguments. However, something has to put the breaks on rising house costs like OP

That's a lot of analysis. I couldn't hang on that long because OP had so many arguments. However, something has to put the breaks on rising house costs like OP says, or we're heading back to pre-1930's where 60% of the population rented. OP is right, 30 year mortgages are a way to increase prices, like what's happening in car loans: 48 month used to be the norm (80's, 90's), but now I've seen 120 month loans. 10 years to pay off a car. Yeesh. Mortgage deduction elimination for non-primary residences is a start: that's gov't subsidy of investors. Once mortgage interest rates go back above 6% that might at least flatline prices instead of this crazy exponential.