I did it cheap - I just ran extension cables from my car (previously from a generator). I have a manual transfer switch at my furnace to safely switch between u

I did it cheap - I just ran extension cables from my car (previously from a generator). I have a manual transfer switch at my furnace to safely switch between utility power and extension cable power, and just replugged appliances. I think everything drew on average about 800 watts, up to maybe 1500. I split it between 2 1.8 kW 110v outlets in the car.