Hey Jeff. You need 12 pieces of MDF. No Problem! Lowes or Depot will do that on their panel saw. But have more than a cut list. Be able to tell them, "first, cut the 4X8 into 2 pieces x" by y", then cut 4 pieces x" X y", etc., you get the idea. The guy on the saw prolly shags carts or drives a forklift. Make it easy for him, he'll do it. Those panel saws are usually out of square an 1/8" at least over 8 feet so make sure when you assemble you leave edges proud of panels, not the reverse. Easy to trim an edge square, you don't want to have to sand down an entire panel. And remember that MDF is 49x97. And see the archives for all sorts of cabinet making info from Bmar and some guy name of Till E. You can do it.