I think you could get some extra weight by adding some moveable side panels. They would bounce back all that side light to the plants. Like a 1/2x4x8 sheet reflective insulation panel.
You could run from a pump in 5 gal bucket. I use a water psi regulator (20 psi) my water pressure is to high. Get the pressure compensated emitters ones otherwise your runs need to be similar to avoid pressure drop.
I have an Infrared (IR) Temperature gun. I measure leaf temp with it.
If your temp/humidity meter is sitting where the light hits it that's room temp.
Put it in with the foliage that is leaf temp.
Didnt see your reply. More growers need to understand how to use thermal mass in a grow room. That bottom heat makes plants bounce. Look forward to the rest of your grow.