1. Abolishing landlords is not the answer (I see a lot of people suggest this). Ownership is a barrier. Rental properties are useful. If there are no landlords there are no rentals unless you want the government to be your landlord. Nobody wants that;
2. Investment funds should not be landlords. Landlords should be local to the area. Likewise, no one entity should be allowed to have too much beneficial ownership of housing stock in any one area;
3. Real estate has special treatment for asset reporting. This needs to end;
4. If you own real estate in NYC, for example, then the city and state should deem you a resident of that state for tax purposes and tax you accordingly;
5. Properties without a clear beneficial owner (eg owned through layers of LLCs) should be taxed punitively in property taxes. You can have your anonymity if you really care but it's going to cost you;
6. Residents of trailer parks and mobile home parks should have the right to collectively purchase that park. There is a quite frankly disgusting effort by investors to buy up these properties and then extort the poor people who live on them (eg [1]). This shit needs to be illegal; and
5. This protection should extend to apartment buildings too. This is essentially the origin of the cooperative ("coop") in NYC. Today, coops still account for ~80% of apartments in Manhattan.
People have in the last 100+ years gravitated to cities for employment. Cities have a lot of advantages. But this has constrained supply of suitable housing stock artificially. There is a lot of cheap housing in the US still but not where it's useful. My hope is that the pandemic is a catalyst for a change that will allow people to move away from a few urban centers. Having more medium-sized cities in various regions is generally better for everyone.
[1]: https://www.newyorker.com/magazine/2021/03/15/what-happens-w...