Most humans don't realize when they lie to themselves, let alone to others..
If a higher authority were to create a list of Must Have tools/ methods to own and master in order to be able to legally call yourself a professional floor cleaner, the following would have to be on that list
A truckmount, unless you only work in high rises
A OP
A 175
A
CRB
A clean carpet wand
and a dirty carpet wand..
A multi-surface wand
A spinner
A nice fabric hand tool
And a filthy fabric hand tool
Finally, a Hydroforce, and the wits about you to properly use and maintain it..
If only been Jon-Don sale staff knew this verbatim ,they may still be in business