I like the idea myself. A wood pellet stove engine might be just the ticket.
Don’t know if wood pellets work with flash boilers. I’ll have to look into that.
The last steam cars produced could get up to working pressure from cold in about five minutes. They seemed like impressive machines to me. You refueled at the gas station just like with the internal-combustion cars because they mostly burned gasoline as fuel. No transmission (just valve gear), but you had a lot of low-end torque and could accelerate pretty rapidly from a stop.
I'm sure Obama's gestapo EPA will find a reason to out law this too.