I'm curious, Rhyce... Did you design and build all those nifty PVC roll around units you've got all your ladies presently sitting on? I like those a lot! Are you going to continue to use them once your space gets all set up?
I use something similar, but I didn't build it. I purchased a sturdy, roll around metal garment rack off of e-bay which has three strong hanging rods up top where I can hang all my lights and stuff from. There is also a sturdy shelf up top that will make installing a carbon filter above the LED an easy job. The bottom part of the rack has a metal shelf that sits about 4-5 inches off the floor, so it's perfect to slide a drip pan under the pots to collect all the run off.
I live in a mid-eighties double-wide mobile home and have very little confidence that my ceiling would hold up all the lights and equipment so the garment rack was the perfect answer for me. The carts would also work very will for people who live in apartments where they can't get too crazy about hanging stuff from the ceilings. A good roll around garment rack provides all the structure they need.