We are finally putting buyable houses and furnature in HG! I am currently working on the script and thought you should know ahead of time so you can start collecting those precious gold pieces! It basically runs like this:
There are open housing areas, which can be claimed by a player. As long as a house is claimed, the owner owns that particular house. Once they log out, their house is put back and open to the public to be claimed by someone else.
House furniture and furniture location is saved on a house deed, and when the player comes back and claims an open house, their furniture is respawned.