Andre --

The short answer is yes! ACP Scheduler will run a shutdown script at the appropriate time each morning, then run the startup script at the appropriate time each late afternoon, while managing the dome shutter or roof. If you have a reliable source of weather, ACP Scheduler will also stop observing when the weather gets too poor or dangerous, then when the weather becomes OK for observing, it will again start your observatory and resume observing with the targets that are appropriate for that time.

If you decide to go ahead with the licenses, you'll have access to the premium support areas here. In the one for ACP, there are sample startup and shutdown scripts which do everything but power outlet control (there are too many different web/script/cmd controllable power strips out there). There are people here who have implemented power control though and they can help, plus I will help also!