PTZ web cam thoughts?

Posted in Equipment but got no replies…
I’d like to put a PTZ web cam up on the roof of my building. This photo is pointing NE, but would like to be able to get some sunsets and sunrises too. Thoughts on how to mount? If I put it on the pole for my wind, I’m afraid it would be too heavy. I wanted a heated enclosure. I do have power available on the roof and could fish a cat cable down to my computer. I’m not really sure where to start. I would like more sky and less ground if possible.
Thanks in advance for any suggestions.
Steve