I think the GP comment has some issues, but this is not the right way to address them.
If someone owns all the houses but does not rent them out at a reasonable cost, so people have to sleep on the street while the house stays empty, then I will call that hoarding. You don't really address that core problem.
If someone owns all the houses but does not rent them out at a reasonable cost, so people have to sleep on the street while the house stays empty, then I will call that hoarding. You don't really address that core problem.