Tax break on single home ownership, but significantly increased tax on multi-home-ownership?
It would be interesting to see comparisons between PE ownership in markets with property tax vs markets without.
So let me propose: a wealth tax on land! ("Georgism"). But not a tax on the "value of improvements," i.e, buildings. This disincentivizes single-family homes near train stations (widespread in the town I grew up in) and is very low-cost to collect.
I don't know where you're writing from. But here in California, the source of all evil (Prop 13) originated with single-family homeowners trying to *escape the property taxes that result from their opposing new development.
Given how spectacularly CA housing policy has failed, perhaps it's time to try the opposite: Let's abolish all income taxes and exclusively tax land instead! (Land taxes have the property of being extremely progressive wealth taxes that are dead simple to administer.)