Get a 6,000 watt. I back feed mine and it runs everything in the house except the central ac, water heater, oven/stove and washer dryer.
It is good for a couple widow ac units and every light, ceiling fans and the fridge/freezer in my town house.
Pay attention to the decibel ratings. You can get a quiet one and it doesn't have to be a honda or yamaha.
What does that mean? And what brands beside Honda are real quiet?? :) RD