Wanted to update this. Got the building up, temporary CO. Was hoping to get the walls painted and floor epoxied before starting to work in it, but (14) 53' trailers came in this month, (4) with roof wraps!
We normally do about 14 big trailers in a year, so I don't expect to maintain this many trailers at a time. My initial plan was to build an office/lobby behind one bay making it about 35' deep bay, which limits me to 1 large trailer being installed at a time (rendering in first post). I still plan on doing that, but it is nice having this big wide open shop.
The lighting I put in is (12) 150w LEDone high bay UFO lights. They are awesome, it's really bright, not blinding. I positioned the lights in 3 rows, 1 in the center and the other rows 4.5' off the walls.
I haven't installed any heat or AC yet, trying to figure out what I need. We run propane hot dawg heaters in the other shop so propane is easy. We did 3" closed cell spray foam in the walls and ceiling. I put (2) 8' ceiling fans in to circulate. So far we had a few day stretch last week that was mid 80s and pretty humid, but still cooler at night. The shop stayed cool enough temp wise, was warmer up at the ceiling when wrapping the roofs. But the humidity was too much, wrap vinyl started wanting to stick too much/easy. Ended up putting a 4500 sqft dehumidifier ($250) and that was able to pull the humidity from 88% to 60% in a few hours.
I think though, once the nights are warmer and we get some heat waves, probably going to need some air conditioning. A friend suggested to me to run 1 big propane heater and 1 big mini split system. The propane heater throws heat quick to recover from opening these big doors in the winter (this I know). He said the mini split would be supplementing the propane heater in the winter and would be sufficient to keep the shop cool and dry enough. This seems like a good plan in theory to me, has anybody seen a similar setup?
Also still debating whether or not to add grit to the epoxy when I tackle the floors. They did a really nice job with the power trowels on the floor, it's supper smooth, looks polished. So defiantly going to have to etch it before epoxying, but wondering how slippery this floor will be without any grit added. And how much of a pain in the neck it will be to keep clean if I do add grit.