Sorry, not sure what you're currently building, but are you going to build a tent and use 8 Drainway trays? Love Drainaway, but you might look into a flood table to run that many plants DTW plants.
8 drain away trays for flower and 2 22” trays for veg tent that is 2x4’. Using 8 port manifold on a sprinkler riser on both that connect to the pump from reservoir through a vinyl hose.
Drain away trays connected to a pvc pipe that runs to a condensate bucket inside tent but the veg tent will need a bucket probably outside the tent, maybe inside if I use my stoner brain, use a flexible hose.
The veg tent could use flood tray as I plan to air layer clones in there but hoping these trays can cover that too. In mean time will have 8 plants on those trays, I can cut hosing to keep plants level. Bonsai mothers somewhere inside veg tent.
Might throw a 2x2x3’ on top of veg tent for cuttings and bonsai mothers until I find my strains and air layer them to work around plant count and rooting times.
Flower tent, each plant will have 1.5 square foot, half gallon or one gallon pot on a 12” drain away tray. I thought flood trays would be better for SOG like 24 plus plants. One 60 gal reservoir for all plants, maxibloom from begenning to end.