Mobile Car Detailing on weekends: Is it worth the setup effort?

Looking into starting a basic interior/exterior mobile detailing setup to run on Saturdays.

​Got a quote for a portable extractor, dual-action polisher, and decent microfibers coming to about $1,100 total. The main bottleneck seems to be water access if doing it fully mobile vs doing it out of my own driveway.

​To those doing detailing in Aus: Do clients usually mind you plugging into their outdoor tap and power point, or do you need a full generator/water tank rig from day one?