You already said you saw what you wanted from this game and the new content does not interest you and that you can't recruit new players.

If that is the case and you are not inhabiting the game as much as other players would, then it is fair to have your house removed, items returned to you and the spot opened up for maybe a new FC that is getting it's roots.

I suppose if you don't want to lose the house, your only options are to log in once every 45 days to maintain ownership.