He isn’t wrong. Maybe he feels he needs space or wants to be more independent. Did u ask him as to why he wants to move out? Plus it’s not like he is ending all ties with his parents, he just wants to have his own place. It’s totally normal. As his wife, you should support his decision. If you were the one suggesting to him that you want your own place and don’t want to live with your in laws anymore, wouldn’t you want your husband to support your decision? My advice to you is just to support your husband every step of the way. If you listen to him now, later on he might just listen to something you want. The more you argue and say no, the more he will stand to his decision.