Russ Johnson and Bob at PressureTek have every chemical, detergent, tool, answer and business building product that you will ever need. I get it that it is cool to buy product at the dollar store but I've never once met a clerk there that I trust to help build my business. But I do buy all my disposable reading glasses there because Bob doesn't sell them.
Who do you call when you have an equipment issue? Where do you go when you have a question in the middle of a job and do not know what to do?
As you move into the realm of professional contractor and give up your amateur chemist position, please consider supporting the vendors that support the industry that puts food on your table.
IMHO, all other disclaimers apply.