As I said before in the other thread we have resold a guildhouse bought with an alt guild so that person could have a house to himself, currently we work on a one guild one house ratio.
Hate having to quote myself with emphasis so soon after posting, also until the auctions actually start take place and bidders come forward there is nothing we can do, no one to hunt down, so to speak.
Of course if the Octarchy does find a guild trying to dominate the auctions then theres no telling what could happen, sequestration of guild assets, disbanding, the Octarchy is a cruel mistress