That's not crazy, it's actually a publicized optional feature on the F-150 Lightning, and the F-150 hybrid has an optional 240V 30A output that can be used as a home backup as well (although that'd be a bit more manual).
Depends on your appliances. 30A @ 240V is 7.2 kW; which is plenty if you don't have AC or electric heating or cooling. If you do have those, you'll at least need to be sure not to run any two of those at once, if you can run them at all; you need to be careful with things like dryers, heaters, heat pumps, air conditioner, oven, stove, water heaters (especially tankless, but check your amps on an electric storage water heater too). Well pumps can be big loads too; mine is rated at 30A by itself, but many people have smaller pumps or utility water.
FWIW, the F-150 Lightning car to home option only goes up to 40A, which isn't that much more.