there are so many problems with your post but the assumption that defunding the police is necessarily going to cause prices to collapse is probably the most obviously biased one.
the idea that you should view housing as simply a matter of supply and demand and not consider any externalities is an abominable position. All people need shelter, it's not something that people opt into for the enjoyment of it alone. By the logic you have presented, the top 1% of people banding together and buying up all of the housing and squeezing everyone else is perfectly fine if it makes the numbers look nice, regardless of how it affects people's lives. The way you have framed the problem is inhumane.
Another way to make rent more affordable is to raise the tax rate on income generated from residential rentals to the point that people are not buying up all of the housing stock for the sake of investment alone. Income from residential rentals is taxed at the same rate as ordinary income, the kind you get from actually doing something. Why would anyone work if they can just own someone else's house instead?