Don't bid on big house = bad chance -> get house small then try and bid for something bigger.

It more looks like the op os complaining about that other people also will bid on medium/large and as for a bonus system, it wont help anything once everyone in the bidding wars has +3 chance to get a house and move the system back to point zero.

If competetion is to fierce and housing is everything for you, move to another server.

Removal of grandfathering and FC master of multiple FC's is something SE need to do, however if someone have or got 10 different paid accounts I see no problem though.