I only ever do what the voices tell me.
To answer your question I do not take the diesel burner to every job. It's not practical. Its principally for:
Large Bookings. - complete 4, 5 and grater bedroom homes, sporting clubs, restaurants, exterior tiles, concrete.
Bio Cleanups - Blood and trauma cleanups. At 150c I can sterilise with tap water.
Vacate Cleans with No Power
For smaller jobs I will use the customer's hot water supply in conjunction with electric heat from my porty.
If I only have upholstery to do I just take the porty, a very short run of hose (5m / 16.4ft) and my UPH tools.
If I have a small bathroom of tile and one room of carpet, or two rooms of carpet, or two rooms and a hallway I take the porty, a 5 m hose, a 10m hose (32.81ft), My Kleenrite VacBoost (an inline vacuum booster with a small catch tank on it) and my carpet and tile tools.
it's a modular system.
When I need The BIG IRON, I have a specially modified 4 stroke pressure washer which can output from 600 - 3000PSI and 10L/m or 2.64Gal/m. This feeds into the diesel burner and the Nautilus and Vacboost just do extraction.
I also have three 4 stroke petrol / gasoline generators when needed.