I have now written three comments and erased them all. Mostly they have to do with the large amount of money in aggregate we are talking about, and possibilities should the deal go south. I have estimated best case scenario for based on the contract above, and would rather back out now than later. That would be totally unfair to others involved. Once the deal is made there is really no backing out no matter what happens. And as I said, that could get really expensive.
I apologize for being/seeming negative. I just know how I feel at this point.