If it's like the Hyperlites, the Mobile Fuel Station is required with the generator prep as the fuel station gas tank is also used for the generator. The "pump" you refer to is to fuel toys, not the generator, but its part of the fuel station package.
As long as you have the factory gen prep, installing a generator is not that complex if you have good mechanical/electrical skills, but they are HEAVY and you have to lift and manipulate into a small compartment.
Personally, my back is worth more than a grand.
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