Years ago when thinking we might buy on island we asked and we were told no TS on French side only direct ownership which can be rented back out weekly and that to do that you must deposit a secure amount into a French bank account---I think it was 100,000 USD and you may add to it but not drop balance below that amount. That may have changed I don't know.

A friend of ours bought something using their business as security and did the weekly or monthly rental thing for a few years then sold out. So I know those rules existed once. They used to let clients and employee use it as a bonus.