He is choosing the wrong platform if he wants to stay in business. Just looking at the welds, it's a beginner at best. That kit is at most a $3500 kit. Add another $500 or so on the price he's asking and you can get the ACF bottom mount kit on group buy.
Going back through this thread this post made me laugh. I still can't believe how hard people try and keep ACF relevant. I've been hearing about this bottom mount kit, some sort of public release, and the greatness it holds with its impending release in "just a couple weeks" for the last 6mo.