PW's are like painters, anyone who can pick up a paint brush is a painter, and conversly if you have a PW'er your a pressure washer?
I get more work from theses guys, cleaning up thier messes. I am self taught from the early 80's when there was no school, no support, no web. I learned by trial and error. And, I made it 28 yrs. I started hood cleaning in my area, trained 4 guys and put several out of business, because they were clueless. I put sparkle wash in thier place, waving a long wand around. If you fail to take advice from us who really know and have been there/done that, your a fool. This board is here for you to get advice, not offer poor advice, unprofessinal advice. Your going to get some poor guy into the crapper and fast. Either you KNOW or you don't. Offering advice as to go top down is one point well made. Do what you must, but let the pros offer advice.