As for the radon, at least in the sates I've bought in before, if it fails the test (radon testing is fairly new) then you can usually get the seller to pay for the evac pump, because once it fails a radon test they have to declare that to all future buyers. It's usually less than a grand, our seller got mine done for like 800 I think. All depends on the layout of the house.
As for the design, I really like the look of that.. I moved over Halloween and my collection is still in boxes... I may have to make a move to a setup like this, saves me shelf space for more games
Looks good man, keep the pictures coming, I'm gonna mine them for ideas lol