Also, ditch the trolley if you can, and go van mounted.
I an tired of reading advice like this remember a trolley is a van mount with a small tank.
Its easy to start at the top.
I have this ionic system and a fancy sign written van with a wrap a round.
Just look at me I am a top windy.
Remember they all clean the same.its the tools in the smart hands that achieve results.
No wonder customer do not respect our industry.
No, wiz, it's not window cleaning snobbery. If a window cleaner has a van, then the cost of making it into a van mounted WFP system is probably cheaper than buying a trolley. You get a 2nd hand tank for under £100, a pump and controller £150, hose and hosereel £100 - so total cost is about £350.
Obviously if someone has a trolley system, they'll already have the water purification stuff, holding tank and poles.
It's just an EASIER way to work, so you can work quicker and longer and make more money.