All the advice has been given previous mate, if you look at your last post I would think the moral would have been to learn from your mistakes?
it's not about what we think should be done on here, it's about doing a service for the customer and both walking away happy... what we think makes no difference to what job you do as it's your job.... if you clean it and you and the customer are happy then whats the problem?
However, if next year you get guzumped by another guy just trying to start out pressure washing (like yourself now), by either being cheaper on price or better on service... then it would be time to up your game, but hopefully by this time (if your still in business after the winter) you should know where you have gone wring before and how to up your standards
We all start somewhere and have all learned the hard way, made mistakes, etc, there is no book that comes with pressure washing / exterior cleaning. And I suppose some members on here are reluctant to give their tips / views as they have worked hard to achieve them, I have spoke to alot of the guys on here now and they are all great and willing to share advice, no matter how they come may come across on here....
As stated before, you will learn the trade, but it does take mistakes and definately experince to get there.
Price it to what you think is worth it, not to what we think, do the job to what you think is of 'your best' standards, if you post it on here after you've done, then expect critism, but don't take it to heart, learn from it, remember these guys have done the job for years so have aquired higher standards than you may think acceptable.
Hope this helps?
Lee