If you want to thrive instead of just survive, consider a large emergency portable generator (6,000-9,000 watts) instead.
Yes, you can string extension cords from the generator. But, you won't be able to tap its full potential.
Instead, large generators work best with manual transfer switches that can restore power up to 10 circuits in your main electrical panel. In other words, they can energize multiple rooms in your home (minus a central air conditioner).