How many people have multiple houses?

[Azurymber]

You have friends on Balmung with 6 or 7 houses? Friends? Balmung?
Selfish ingrates...perhaps. But friends?

I don't understand what you mean? There is nothing wrong with owning multiple houses is there? I mean SE lets people flip houses for 100s of millions of gil. That's a huge incentive to buy up land and resell. Fastest way to get rich in the game.