Not certain I agree with your comment about economics. Perhaps it applies in the OBX area. We own a beach area rental house in South Carolina. I installed a Clipper Creek HCS-60 charger a couple of years ago. I made it available to our rental guests. I can't make it available for general use because it is installed in the driveway area under the house --- so connecting to the charger will block other cars.
My electricity rate from Santee Cooper is just a little over $0.10 per KwH. So if a rental guest were to bring a Tesla with 100 KwH battery, drive every day of the week and return with zero miles remaining each day (hardly likely, I think), it might cost me $50 or so. At the prevailing rental rates during the summer season, that is not a concern. However, during the off season, when the rental rates decrease significantly, I may have to consider this differently.
We updated our rental information sheet used by the real estate office that manages the house for us, to include mention that there is an EV charger available. I also listed it on PlugShare as a restricted location (restricted to use of our rental guests only). We are the only property with an EV charger managed by this real estate company. In fact, they were surprised when I asked about it. We've received nearly zero interest.
BTW, if your're interested in viewing it on Plugshare it can be found at Pawley's Island, South Carolina. Name of the house is "Sea Gals".