When we leave Michigan for the winter we set the thermostat at 50 degrees, turn off the well pump and water heater, put cooking oil in the drains and toilets, and go.
Our daughter comes by to check the house occasionally but I have a
Generac 16K whole house generator that is powered by natural gas that sends me a text message plus an e-mail whenever it runs, plus a
Temp Stick that sends me an e-mail if the temperature gets below whatever low limit I have it set at. It also lets me know the temp and humidity via a cell phone and computer app that I can check daily or whenever.
This routine has worked well for us for the past 15 years without problems. I just have to keep my WiFi going while we are gone for the Temp Stick to work but the generator is completely independent and does not need my WiFi.
Barney