Not sure. In the comment I replied to, they mentioned that EV is good 95% of the time. In that case, renting a car, like once a month, for a long range tip would make sense imo. Better yet, public transport, then rent an EV there.
Or just get a PHEV. And then you only need 1/3 of the batteries in your car, and you don't have to deal with rentals. Does it really make sense to have 300 miles worth of batteries that you haul around in your car when 90% of your trips are less than 100 miles?
Have you dealt with a rental agency in a population hub any time in the past 15 years? It's awful service and such a pain to do all the research anew on pricing every time you want to do a drive.
Much easier to manage your own predictable resources than try to shove your use-case into another organization's framework.