Well finance hit another snag. The valuation of our house came in about $30,000 under what Mark had budgeted for, so we're still pretty much in the same hole that we were in before, having to put more into the intial loan to get it all started so they can do their whopper loan.
Dad has done some shuffling of numbers and is pretty sure we can still do it, we'll just have to do a land loan first, which can should be able to afford while still having our current house, then sell the current one and then get a build loan. Little more stuffing around and I'll need it all explained to me thoroughly but he's pretty sure it can/will work. He needs to talk to Mark about it a bit first.