Well guys, I guess a lot of us are hacks here! LOL I think I am going to tray a leg set up kinda like Tom's where the support comes from the toe of the wall out to near the edge of the layout!
Carl, AKA Moonman brought up a good point, I don't have to go every 16" so I think I will put one in at every 32" Stud! but I still think I will go with either 5/8th" or 3/4" plywood! I think I will just buy 2 X6's and rip them into 2 x 3" for the supports as it is cheaper then a 2 x 4 x 8. Go figure!