I've got plans for a six plant set-up. The grow space is three feet six inches height by twenty inches deep and 28 inches wide. I just measured out the wood, cut, painted white (inside only) and used screws to put it together. Then i sealed all the corners with sealant. Cut a hole big enough for the 400w HPS bulb i have and a hole for an exhaust. The front cover is poster board taped together and velcro to stick to the box which makes a lid. Mylar the inside and a fan in there and your ready to go.

Thats just what i did. Maybe you could get an idea for what you want to do. Good luck. HAPPY GROWIN!!!!!!!!!!1