Why not just add instanced housing?

[Shirobi]

But, SE seems to have some very questionable architecture... :/

AMEN

I cannot begin to the fathom the sort of inefficient in coding or the sheer antquity of their hardware that something as tiny as player housing, especially instanced player housing, has such a huge premium in server space and resources attached to it.

Something is terribly, terribly wrong with SE's architecture in this game, be it the coding, the actual hardware, or both.