[dragnet2]

I have no experience in building clock drive systems for an equatorial mounted scope. I would buy a used one one. But I'm not sure I get the question.

Are you looking for a shelter for the scope?

If you just want to leave the mount/scope outside, look at scope/mount solar covers like the one below.

[Do the math]

Back in I think 73 I was tracking comet Kohoutek. My calculations were 1 degree off. I spent hours going over my calculations, but I could not find an error. I read the reference manual over and over until I was about to give up. Then I was working on an another problem that required a well placed reference point. My reference point was NO LA, which is
about 60 miles a way from where I live. Now, 60 miles is approximately 1 degree. After I adjusted my reference point I was spot on. I quit astronomy after that day,