near future set up.

first of all this is going to be my first hydro grow, the idea is to have all the plants in bubblers, starting with two mothers under a 400w mh in 5gal bubblers, Clones would go into a six pot bubbler 21" L x 14" W x 14" H under floro's till root then for flowering i would have two of the 21" L x 14" W x 14" H six pot bubblers under a 1000w hps. only filling three of the pots from the clones every two weeks, the idea being that after 8 weeks or so i should be harvesting every two weeks from three plants. im only really wanting to havest an ounce or two every two weeks, im worried this might produce more but i might be wrong. If you have any feed back or advice that would help, just really wanting to know if this sounds like a good small system.