In a garden that size I would personally run the larger units. It really sounds like you could use a hand I’m ready just let me know where to go, lol. Not familiar with med laws there do you have a plant count limit? I love dwc and a lot of people kill it in dwc but a lot of people fuck up to. Do you have a good bit of experience with Dwc? Not at all trying to discourage you just curious on why chose dwc? I personally would run tables with rockwool in an op that size. With drippers there is virtually no waste in water and no Rez draining and throwing out old water. I know drain to waste sounds more wasteful but in practice it actually waste less water and nutes. I’ve seen jungle boys comment they don’t get much if any run off on their rockwool setups. If you have plant count limits then by all means rdwc is the way to.
Good luck on your endeavor, Not gonna lie I’m slightly jealous, just finishing up building my “bigger room” and it’s only 4K watts.