Posting for a friend and limiting to facts as their spouse has flying monkeys in many places.
Friend would like a trial separation but neither they nor spouse are able (or willing) to move out. Party A has friends and family nearby who could put them up. Party B does not.
Assuming divorce is the only option would they be better to sell the property first, move separately and then divorce? Or divorce first and then sort those practicalities?
It looks as though things will not be amicable and party A has already been putting obstacles in the way of any attempt to make progress.