3.41 btu per kwh is a lot, I'd say, air conditioner is the safest and expensive, approximately which all depends, only one exhaust fan does the job of 5 air conditioners and uses only 300 watts instead of 5000 watts, so is a huge difference.
I was thinking for some reason that the air conditioner was going to be less expensive. I was mislead by the "cooling" aspect, and I suppose I didn't put enough thought and consideration into the pressure and exhaust. I thought the air wouldn't need to be pushed out through an exhaust if it could simply be cooled. My physics knowledge needs some serious work, because I'm still a bit confused, but with more information to tackle the problem. It sounds more like the A/C is going to cut into my profits, increase ROI time and potentially completely negate the profits all together.
Does it matter where the holes are in orientation to the hardware or each other? I would have to make some holes and have them prove to be unhelpful. As you said though, might be better if I just make one and get a better feel for the whole idea.
it'll be running flatout 24/7, which kills anything non-industrial pretty quick.
All of the A/Cs I've had get run pretty much 24/7 all summer, never really had any problems. Have I been accidentally buying industrial A/Cs?
