Moving in

Hello all I'm new to this group well me and my SO are about to get our first place together and we have been looking at a couple of places but I live with my parents right now and I'm ready for us to take the next step and he lives with his mom and when he moves I think his mom is moving in with us at first I was all for it but now I feel like I should just get my own place until she is ready to get her own place without them two living together in so confused on what to do because we really want to live together