I don't think taxing the players is the way to go here since you are basically just punishing the players for being able to use a function that should have been available to everyone like in every other MMO and not just a few. Granted there are greedy players out there who exacerbate the problem (and in every other MMO) but ultimately SE developed a housing scenario where it was never gonna be possible for everyone to have a home even if everyone had the gil to purchase one due to the obscenely limited amount of plots compared to number of players subscribed. Players are already evicted every after 45 days of inactivity there's no reason to punish the players that do play and have a home by forcing them to waste gil every week just to keep their home.