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A/Cs use a lot of power. Solar cells wouldn't handle it.
Be interesting if you can make it work. I think there are some serious barriers there.
Are you planning to mount the scope on the steel floor?
Generally the base needs to be separated from the general floor to isolate it from vibrations. Like a concrete pier set deepish into the ground and separate from the floor. I dug a 1 metre deep hole and its about 800mm square with lots of steel in it and then poured concrete in it and it extends about 100mm above ground. That seems totally stable and no vibration effects.
The main worry would be heat. You don't want to fry your scopes in summer.
When I built my observatory I lined the roof and walls with Aircell Insulbreak insulation. I sprayed it matt black on the inside.
In really hot days I was pleased to find the inside of the observatory to not be that hot. That is despite being colorbond roofing and walls.
The insulation ideas are critical. A couple of whirlybirds with mesh base and a solar powered vent would be good. The foam roof with something on top sounds good advice as well. You can buy colorbond sandwiched foam roofing panels. Much like used in coolrooms. They'd also be rigid and would make it easier to build a roll off roof. Put a 100mm C purlin on top and stitch some of those together and fix some wheels and you got a roll off roof.
Greg.
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