That works bro!
Like KK said, get some 8" XXLs and a nice 8" extractor. You already have an A/C?
I assume you are sealing this bitch up and doing CO2?
With 7ft wide it will give you some work space for that Dehum, heater, Wall fans & A/C (make sure you avoid the "heat extracting" portable ones)
Nugs has it right, main line all those bitches! Shouldn't need more than 4ft of plant height but ensure you are able to ratchet those lights all the way to the ceiling if shit goes crazy (and so you can clean)
edit:
quick note, the last thing you want to do is pack that room tight, you limit airflow and it becomes a pita to work.
Install a green light in there so you can work during the day, I haven't been in my room past 9pm in months.