Rather than a disposable vehicle, I think it will be like a core charge for a battery. You turn in the old one and buy a new one, and the store recharges/refurbishes or disposes of the old LENR heat pump. It’s like getting 25k miles on a tank of gas. Refilling stations will be fewer and farther between.
Make lead box about the size of a bread box. Loop pipe in box.
Attach water tank on one end.
Attach boiler on other end.
Place steam driven generator between boiler and return.
Place a fist sized amount of Palladium or Thorium in bread box.
Attach contraption to any electric car.
Now you can drive it for 16 billion miles or 150,000 years.
I can develop this and have it ready by next month, but I will need capital.