Not much can be done before Monday.
Go fishing or some other distraction, no need to tie yourself in knots when you have no control at this point.
With wife in the business, even if not a property attorney she should know someone if it comes to that.
Sounded like they guy was a little odd from initial contact, as written. his odd behavior now may just be who he is.
Also sounds like you may have damages, loss of 1031 benefits. Was seller aware of the 1031 implication?
He could probably pull off a contingent memorandum of agreement with the owner of that land the seller wants to buy.
