I mean after all we're just spraying THEIR water and a little bit of Clo Rox, right? We all went to Northern and bought the $299 PW and are working out of the back of our Saturn wagon, right?
Don't feel bad, we do commercial work exclusively and have the same problem. One of our customers saved $.01/sq. ft. last year on 15 shopping centers and the person I really felt sorry for was the contractor. He didn't have a surface cleaner and he had no idea what a bulldog the PM was. He prolly started getting calls from her 3 months after the job about all the wand marks that started showing up on the sidewalks.
Just keep your prices where you need them, keep doing quality work, and let nature take it's course.
