This could possibly work. Housing is a luxury item, so only those with gil would stand a chance, but at the same time it would make it very hard to plan. I feel like most people wouldn't want to spend a lot of time waiting to see if they get the house or not too. People have to go to work and such, they can't sit there and bid all day long. And to place a bid and walk away would almost guarantee that you won't get it.