Great idea! And now that Airbnb has finally, finally, finally made the EV Charger flag searchable, it will likely give you some useful results. Just remember: You'll get calls, if anything goes wrong with the charger. Local managers rarely have a clue about them.
I was the first in Pacific Beach San Diego, to offer an EV Charger - long before it was a searchable feature on Airbnb. Nobody took me up on it until this weekend, when we had a Model 3 trying to charge and get the blue light only. Called the electrician, but by the time he arrived, the car had started charging. We suspect the adapter wasn't seated properly, but hard to figure out retroactively.
bluhausrental.com