Re-use water is out. To much red tape and run off, time is still involved. I have considered bumping to a 500 gal tank (I have to check my weight limit) to help. Thought about saying OK... I'll give you one trip per job in exchange, no concrete cleaning house and garage only. That would allow me to clean all with one tank. Next issue, they say they want three houses in one subdivision cleaned on a given day. Thats three trips hauling water or atleast 4 hours travel plus fuel and wages. I can't eat that much. I will call you...Thanks.