NOTE: People can get by without a "home" generator installed to a house, which is typically very expensive to have done properly and requires a pricy transfer switch, because without a TRANSFER SWITCH, a powered up house through a service breaker box can kill a Lineman working on a powerline they think is disconnected - SO PROTECT OUR LINEMEN, don't install a generator to a home without the proper connections and transfer switch on the home.

That said, one can use even a 2000watt (2kW) generator to power a typical freezer/fridge for example, & these can be purchased for $1000 or much less, even used, run them outside always, and connect directly to the appliance with a heavy extension cord.

With most non-industrial generators, it's best not to run them continuously unless they are designed for that (1800RPM Diesel is OK).

Run them for like an hour, then shut down for an hour - to keep fridges & freezers cold. Saves fuel, and also prevents higher RPM motors from melting down.