This is not starting off to be a good week

The garage I'm having built at the house has been one @#* after another

As many of you may remember, I'm building a 30X40 toy room in the back yard, but they only poured a 24'X30' slab, says he can't go wider unless a tree was taken out (he said that he would do that) and will extend the length. Well, he started putting up walls today and tells me that he needs more money, I ask him to show me the receipts and where the $20K I have already paid him has gone and until I see where it went, I'm not going to give him any more money. Well, he said if he didn't get any more cash today, he was finished with it. I have faxes the contract to my attorney. Here is a crappy cell phone picture, as I'm working off my laptop while my desk top is down. Sure doesn't look like over $20K of work to me.