Host to houseguest: "Hey Bob, of course you are welcome to keep enjoying our hospitality. But, I just wanted to let you know that there is an amazing deal on a nice hotel across town."
(1) Set a boundary here. Trust me, you will not like W's mark being on your place: "W, I really appreciate your help and respect your opinion. But this apartment needs to be my own place. So, please back off."
(2) Find your own place. This weekend. Move within a week. You might want to call some Realtors. The housing market is terrible. There are homes/condos/townhouses sitting vacant with desparate owners paying two mortgages. You can likely find a great deal if you are willing to go month to month in case the property sells.