Since you still don't know if this is what you want DO NOT move in with him and his girlfriend. What would you do if you decide you want to be monogamous, he doesn't, and you two break up?
I'd stick with your plan of moving to the city for work but keeping your own place until you know what you want.
Woodsmith: My husband
Merry: Tig's wife/slave
N8: Merry's boyfriend/owner
Elle: N8 girlfriend
Ruby: Part of the Leather Family
Logan: Leather Sir in the Family
Arc: Logan's boy
Holly: Leather family
K: Holly's sub