interesting idea!!! that woudn't be half bad! I would have said a 3x6 tent, with 10 plants (4-5-4 set up, also looks like 2 hexagons with plants in their center, but the very center plant in the room is shared). OR... acctually the 4x4x7 on it's side would probably work better... leaving little space for a filter inside of course, but there's a work-around for that as well. Acctually.... you could put 2 of those on top of each other..... hmmmmmm interesting idea. Doubling your space effectively, like the sound of that...