[jeffbee]

Just think through the consequences of your policy proposal. What you are saying is you will outlaw investment in a second house for rent. The result will be that only the people who can afford to buy a house can live in one. Everyone else, which is half of American households, has to live somewhere else. You haven't specified where that other place is, but I guess it would have to be larger apartment buildings, built and operated by larger organizations (corporations, or at best cooperatives).

I rent my house from the woman who lives next door. I could not afford to buy this house. I have a nice garden and my kids go to great schools. Your policy means that this arrangement is forbidden. My family is not allowed to access this life because I am not rich enough. That is a bad policy.