I'll repost what i said in another thread, regarding the plot and house sizes.

Quote Originally Posted by Vocal_Night View Post
Have they ever toyed with the idea of having neutral plots instead of Small, Medium and large?
That way the size of the house is decided when you are constructing.
So say you buy a plot for a fixed price the devs decide. Then you build a small one, or if you have the gill a large.
But in case you were only able to build a small, it's no big deal, because you could make more gil and then pay the price to upgrade the house to a medium or large. Kinda like animal crossing.
That would solve the problem of FC's having to settle with small houses since people snatch the large ones in minutes after patch. Also would give people something to work for if they have a small, increasing the gil sink.

Wouldn't solve the bigger problem of housing and avaliability, but hey.