Maybe a more suitable alternative is to have level streaming in the condos if that makes sense? e.g when you open the door in condo lobby it loads the condo map like the other places in the plaza like the Casino, kinda like lobby 1, its there. Then you walk in and it then loads the condo serverside (furniture, canvas, etc) owned by the user.
Maybe I sound like a mad scientist or just a stupid person but I think it would be a good alternative.