Re starting each journey with a full tank......not so fast. I have clients who tell me that unless the car is on charge all the time it runs down the battery even if it doesn't go anywhere. So it's no good charging it Monday night then not using it till Thursday or you're in for range shock.

250k substations every 50 properties?

It's a shame really because since covid we hardly go anywhere and could easily run an electric car and just use petrol a few times a year. Could even just have electric and hire a proper (!) car when needed.
Nick