@Walter310 Airbnb won't touch that with a 10-foot pole. Do not offer a motorized vehicle as in inclusive feature with your Airbnb.
If you have all of your insurance and liability coverage in order to legally rent out your vehicle to other parties, I suppose you could selectively offer it to your guests at a discount, as a distinctly separate business venture. But if access to the property requires guests to use this vehicle, rather than their own, you might find yourself in a bit of a pickle when something inevitably goes wrong.