Do you know how sometimes wizards will throw parties? Well usually they will add someone then port to the house and so on and so forth. Well how bout you can have a button on the players character when you go to your friends list and it will say,"Visit House" if they click it ,it will send the owner a message that says,"______(name) let visit your home" either click," I agree' or "No". You could also lock your home so they can't try to enter it. A professor please reply on what you think and if you would consiter doing this in the future.