You can do it with two room's
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one room with a t5 in this room is just for vegging,take the clone's just before you put the big plants in flower ,take the clones of these.
while your flowering just keep topping the plants in veg every branch, By the time you get to week 8/9 you will have plant's at around 2 1/2 ft tall ,but bushes .So make the unit big enough for the vegging plants.
This is what i do have a crop every 8 week rather then every 12/13 week,but you will need the right amount of t5 lighting if you are doing more than two.
The grow you are doing is big ass you will need hps lights for that amount but it could still be done the same method,2 rooms cloning,