For that area with the setup you suggested, a pair of 4', T12 shop lights for the vegging young plants plus a MH250 for the mothers would be lovely, and pretty inexpensive to slap together. Spend the $$ you'll save on the T5 fixture on a nice exhaust system for a little Halide light, and a bulb upgrade. You'll have MORE than enough juice to give all the clones you need in there.