small for cloning like a 2x4 tent probably. a room for veg and 2 rooms for flower so i can have a flipbox. run half at a time. keep the heat down and help warm the room when its cold at night. all i would do is partition half a room. since its inside a warehouse and its not always light proof id build rooms out of 2x4s plywood and drywall with a fire suppression system. be about 16x32 ft with 8 lights i would pull a pound a week. one full harvest will pay for everything right off the bat including power and supplies for the fallowing grow. it would be perpetual so im not stuck trimming 8 pounds+ at one time. also flood table for drain to waste with a 500 gallon r/o res. for clean water becuz the ph of warehouse water is nasty almost a 9.5 and its dirty as fuck. i actually had a price sheet and everything setup. i drew all the plans out on a cad program at school even down to the wiring. lmao.