Why wouldn't there be a stock of rental housing? Nothing stops a full-time resident from owning rental property. If you want to own one (or more) houses there you have to live there. Seems perfectly reasonable to me. I wish this could be tried in the USA, but voters (rich property owners) would never allow it. There are a lot of places (not just ski towns) that are ruined by rich people bidding up property and then leaving it vacant 358 days of the year.