I feel for you! My wife kicked me to the basement! I tried a space heater down there because is was about 60-65(in winter) but the heater couldn't heat the space very good so I put up some fake walls will a couple 2X4's and covered the walls will plastic and cut the plastic in strips for a door like the ones on a walk in fridge. Now the heater keeps it toasty at 80 and saves money on hydro. This may be an idea for your garage!