We installed one back in May 2022. We've had 33 stays since then. No one has used it yet.
Our house is new construction, sleeps 16, in Gatlinburg. We probably get about 4 cars in the driveway per average trip. The EV charger is listed as an amenity on our Airbnb listing.
Cost $1800 for Tesla charger installation.
One interesting insight is that we couldn't get 100% charge ability from the charger because our house's electrical was sized for 225 amps (the electrician sized it for the house's electrical requirements at the time, the charger was an add-on afterwards). As a consequence, the charger operates at about 50% of its full capacity (but we figured some charge was better than nothing).
Anyone adding a charger to an existing home may encounter the same limitations.
Random note: our house was hit by lightning that fried one of the outdoor outlets and our computer equipment but the charger was unaffected (thankfully). The Tesla ones are well built.