One of the other problems that I'm surprised I haven't seen here is the fact of the different regions and themes of each zone.

If I'm looking to owning a Personal House I like to see all the zone around and the location itself. And that fact can be go from "I'd love to have my house near Mist's beach" to "I want my home in Mist, I hate the japanese enviroment or architecture of Shirogane".

Even if they add 3, 4 or 5 new zones with the basic wards, there will be people that will have to live in places they don't really like just to have a house because the regions or places that they really love have been occupied years ago.

Just imagine Shirogane in a month or 2.