Efficient use of space

Thanks in advance for all your input. I'm looking for your opions on the most efficient use of space in my grow shed for a continuous soil grow. Here are the basics:

10'x8' floor space
7 1/2' roof hight
2 1000w MH/HPS
lights in cool tubes with ducting and 2 465cfm fans
6 tube 4' fluorescent

I'm thinking 4'x8' area in continuous 12/12 with 2000w on it. Then a 2'x4' area for mothers and a small hydro cloning center. Go from clones to small pots, then large pots in the 12/12 area. How many plants could 2000w in a 4'x8' cover well? Thanks.