Daimler has a sub rental co. called Car2Go, actually a car-sharing setup. In San Diego, its fleet is 300 SmartForTwo Electric Drives:http://www.greencarreports.com/news/1069811_san-diego-car2gos-choice-for...
The charges are all-inclusive, up to 150 miles/day:
Car2Go has no return time or return location requirements so when you're done with the car you can drop it off anywhere within the operating area and the Car2Go team will handle the rest.
Pretty cool! Considering price and features, the Model S would likely need more security, but hotels, etc could work.