What size room needed for a 12 bucket system designed to grow BIG girls?

I may have to move, which would allow me to look for the perfect house for growing. In the county I might move to, I can have 12 plants. What size room do I need for a 12 bucket flower room that will grow big babies and what is the minimum clear height the cieling should be? Thanks!

I use a 6x5 (30 sq.ft) area for six plants that I allow to grow big. I use 1000watts and 14 inch pots. The room is 6x6 I try to keep 1 ft open to get in but it fills it up. My ceiling is also a little hight that most 9'6". I have had take the yo-yo out and hang the light right on the eye bolts on the ceiling. I can still only have maybe 5'6" plant allowing for roller base (so I can rotate the heavy ass pots, the pot height and distance from the light.
good luck.

I figure a 3 ft diameter and 7 feet height including lights for one plant. 3 ft gives you plenty of room for air circulation and if you have a bushy plant you have the room with no crowding issues.

i run a 12 pot systemunder 2-1000's in a 5x10 room with 7' ceilings adn grow like 4 footers