I think a less heavy-handed way of doing that is, every person can have 1 (one) permanent residence, and all other property you own incurs a much higher property tax. If you’re filthy rich and want a couple of houses, fine, but you’re gonna get taxed for it. But that will stop speculative house buying, more or less. Of course, this will never happen because states race to the bottom to offer low taxes to attract rich people. Another issue is, what if someone wants to live in a house but can’t afford to own it? Renting is the best option for a lot of people. I think that is solvable, but my idea would inevitably take a lot of property off the rental market.