Build it in a mobile truck like an RV, make a fleet of them and drive/park them to where needed Then at end of day replace with another truck while the previou

Build it in a mobile truck like an RV, make a fleet of them and drive/park them to where needed Then at end of day replace with another truck while the previous goes to get flushed/cleaned. $1.7 million could build a fleet of a dozen with spare parts for a decade, fuel and labor to maintain/clean.