If you do decide to go that way, there are apps that manage the fee charging for you. You just choose the rate you charte (based on time on your driveway rather than the electricity supplied). Obviously if you go much above 40p per kwh people will look elsewhere if you only have an 11kwh charger. But if the next nearest is a trek, you can probably charge £4 an hour or so (40p at 7.5kwh delivered over an hour would be £3). You probably won't get rich though!I'm near a big hospital
Of course you could start providing facilities - snacks, tea and coffee etc... !