ok why is this even allowed ? (housing)

[Arillyn]

that needs to have another term then maybe something like 1 house at a time on fc multibuys auto destorys the old houseafter 10 days or something then?

SE had made it that way - one FC house per world. But from my understanding if say your main was in a FC with a house and you had an alt on that same world that was in an FC that didn't have a house - that homeless FC wouldn't be able to buy a house even if you didn't own either FC. So they changed it back for FCs.

Really SE just needs to make instanced housing as a viable option. But I don't know if they can't or just won't.