Need help with design

Im doing a closet grow room will put pics up later but havin a lil prob with designin my veg drip system i wanna do a 4" rockwool drip system.
One of my questions is can i do a full veg from clone to flower stage in a 4" rockwool or will the plant get to big and ill neet to transplant earlier?
The second is I wanna make it 2 trays with 3 cubes in each one, beside each other then the runoff back into the reservoir wat equipment should i use like materials for the trays and drip system? I can design a stand no problem when i figure out wat the trays and stuff will look like and there dimensions.
And I was wondering for my flower room I wanna do 4 plants at a time my floor space for that will be 3ftx3ft wat hieght does anyone reckon 6-7ft i need opinions cause this is my first closet grow room and i wanna make it right.
For lightin i was thinkin of puttin 6-8 flouros over vege and for clones i was thinkin 2-4 and for my mother idk can anyone suggest something dont want it to be mh or hps either the cooler the better. for my flower room ive got a 600w hps with a batwing style reflector.
My ventin im gonna do 2 pc fans into the veg then 2 out into the flower and another 2 into the flower then an inline exhaust witha carbon filter would that be good enough?

Thanks guys
 
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