[JackYoustra]

Please answer the solution to people not being able to afford back yards. Price is a clearing indicator on supply and demand: you can either crush demand or boost supply. If nimbys block supply increases, you either have to pick people to kick out or forbid other people from moving in.

Where do you think the AirBNBs came from? Some people decided to move out, and the people that moved in decided that others would get better use experiencing the property part-time as reflected in market prices. Would you ban them from making this choice? Would you screen every buyer not based on their own assessed price but on ever so shifting "intent"? Would you make the intent they declare at the start binding?

EDIT: I'll bet you $100 to your charity of choice that physical constraints aren't binding in the case you're thinking of (this could be shown by, despite a lax / encouraging planning environment, no one building anything).