I think there should be a bad luck protection system with the lottery. For every plot you lose, you get an extra ticket for next time. This rewards players who will literally bid on every plot and punishes newcomers and people that will only select a specific house. So, your chances will increase of winning the more persistent you are. Granted, it won't work well for certain worlds that are overpopulated, but as long as there is a steady supply of housing weekly with auto demolition and new wards opening up once in a while, this should see people that genuinely want a house getting a house.