Because we snowbird and are on the road much of the time during the summer, I have invested in a small (8000 watt ) whole house genny. It is one with a separate ac electrical panel that controls 10 separate circuits and 2 220 circuits. I wanted to make sure the furnace, sump pump, Refer and a few other circuits were protected for a power failure. When we leave we winterize the house by draining the water down by opening a low level faucet in the basement and opening the faucets upstairs after shutting the water off where it enters the house. Then I put clear saran type wrap across all the toilet bowls then fill freezer bags half way up with water and lay them in the drains of the house. drain the wwater heater and make sure it is off. We set the Tstat to 50 degrees. We allow our neighbor to use our driveway to park a car that is normally in their way and he watches out for our home. We have friends that are close by abd they periodically check the house by going in and looking around. I also go to out local PD and let them know we will be gone for an extended period and they send a patrol car around at random. all in all this does not take too much time to do and the peace of mind is worth the effort.