How to Let a Friend Know He Needs to Find Another Couch

A friend of our family has been staying on our couch Monday through Friday. How do I let him know he needs to find another couch without being the asshole who stops him from providing for his family? Can we create a reality TV show that's like sort of most dangerous game where it's just you have to find Guy Fieri and take his head wear)? Like a lord of the flies kind of thing. It would be sort of like the amazing race mixed with hostile because because you have to take his head due.