you are correct on the rooms and equipment. I use the chhc-4 to control each room. On the smaller one, I have it set to use the a/c for cooling and dehumidifying, whereas the bigger room has the a/c and dehumidifying controlled separately. not ideal for the smaller room, but compromises have to be made at times. also, the controller handles my co2 generators. it is convenient, although I think I'll build a simple high temp shut-off for my lights in case the a/c or controller fail
I can see you'd like to maximize your space, but I think you might be asking too much of it. If the room is a pain to maneuver in or it is a process to move your trays, you'll end up spending less time in there. are you hand watering or will this be a hydro setup? what about
trellising? even though you can move your trays, you can't move your lights which means you will have issues negotiating around those and that means running into them at times.
why not 3x3 tables with a single 600 per table?
also, have you talked to others growing the strains you will use? that might determine the style you'd use too.
glad to help :)