Have a crystal that can be tethered to any location, creating a pocket dimension based on the aesthetics of every zone. Not everyone wants to live in a city. Some of us want to live out in the wild. Allow us to invite our friends to the house. Maybe you have to give them some kind of a key. The key could be a housing shard, and you'd be able to revoke it, therefore disintegrating it at any time. Maybe you'd even be able to set a length of use.