Who is the number one “hoarder” of houses in the U.S.? When I bought my house, all I had to deal with (as far as I know) was the bank and the prior owner, who seemed happy to sell.
1 is pretty easy to experimentally deduce -- simply go live outdoors wherever you are. Skip the tent, that's housing too. Just make yourself a little bedding spot in a tree somewhere like our ancestors did.
Pretty sure in most of the world, you wouldn't last long without some form of shelter or housing.
Yeah, fast progressively higher tax rates based on the number of apples you own would be perfectly reasonable.