Looking for a power bank to Power a midrange PC, and Flatscreen tv for 8 hours

I want to find a powerbank with just an absurd capacity, Ideally something that could run a large flatscreen and computer for at least 8 hours, but really, im just looking for some kind of battery or power bank or whatever that i can plug any home device directly into like a wall outlet, that has a ridiculous capacity, ive considered making one myself but i decided i dont know enough about electricity and electronics to think thats a good idea right now.

I live in a trailer and i just want something I Can charge up and use in places where i cant plug in my trailer