Your mothers are going to require 3 gallon soil pots. We're looking at 4 feet horizontal space for the both of them and 1 foot more for a couple clones. You're looking to train your mothers to keep them below 2 feet and probably vegging with cfl's. That'll be 4 feet vertical space. 4 x 5 x 2 is sufficient. Again, your biggest problem will be temperature control and venting.
Your flowering room will need to be slightly larger vertically. You need 400 or 250 hps lighting here, it's the best way to go. So again, training the plants you're looking at 2 feet plant height, 6 inches height for pots unless soil 1 foot, 12 inches between plants and light, and 12 inches for the light itself. 5 x 5 x 2.
9 feet high, 5 feet wide (could squeeze to 3.5), and 2 feet depth. This is for 2 mothers in veg, 4 clones (throw out weakest 2), and 2 plants in flower. Make sure you don't have light leaks, your temps are below 80, and your humidity in flower is below 60%. That's the difficulty.