Adding up the running watts and the highest starting wattage of all the devices you wish to power with a generator will help ...

That said, there is a 6000 watt gas generator. Running that powers everything - washing/drying machine, toaster, all lights, pump, outlets.

The Lithium 6000 is compact for its power class, yet it delivers a significant punch with 6,000 watts of continuous power output and a runtime of 3,840 watt-hours.

Price: $400”“$500. Large Portable: A 7,500-watt gasoline-powered generator will be enough to keep the lights on and power most home appliances, with the exception of central air-conditioning and heat.

Power output starts as low as 200 watts for mini power stations and goes up to 6,000 watts for larger units, which can then be scaled as high as 50,000 watts or more by adding on more batteries.