Hi Steve. “if any of you have any ideas along the way, I Am totally open to them!”
A couple suggestions from you local or not so local contractor :)) Not sure if you’re using pressure treating 2×4s under your floor or not(I stronngly recomend PT wood),but even if they are pressure treated having some 6 mil vapor barrier under your floor will help prevent your 2×4s and ply from rotting from moisture from the ground. Another couple items that I think might help is to have your flat concrete pads every 4’ foot instead of every 6’ given that you’re possibly going to have some heavy tools in there. It might be too late but normally you remove all of the plant life before you build. This is meant to be helpful not critical
woodworking classes, custom furniture maker