Hey man....your world. I keep my tools and equipment at 50* minimum in winter and run it at 64* when I am in the shop. My gear is to valuable.
I only run the A/C when temp/humidity gets to be unbearable. Have a pedestal fan for the rest of the time.
If I didnt rent my home I would have a legit heater/ac unit out in the garage but since its not my home I can not do that...