Lacy. I had a similar issue. He said, "You tell me what you want and I will build it." The problem was I did not know what I wanted. I started out with what I knew. In my county I can grow a 10x10 canopy up to 99 plants. So I knew I needed at least a 10x10 area. Then I figured I needed room to walk around in there and a way to divide the room for veg & flower. The finished produce is 11x13. He basically built an empty room and I had to figure out what to do with it. The main thing was putting in enough plugs where I thought I would need them. To maximize my veg space I bought two baker's carts from costco. There are extra shelves so we figured out how to hook them together two make three shelf areas. That became my veg area. I can fit 14 1 gal bags on a shelf and 10 3 gal bags per shelf as they get bigger. I have roughly 50 plants vegging and 2 shelves for clones. We separated the room with a curtain (velcro works great!)
Anyway, I don't know how helpful this is, but if you need help, let me know and I can get you details, etc from my hubby.