Got to agree with Bill
I can, and have, taken lads from never cleaning a window, to doing 40+ houses a day as part of a two man team within a month and receiving positive comments from customers about their professionalism.
I am trained and qualified as an avionics engineer (3 year apprenticeship, though my licences are now expired), I have an MBA in business management (2 years study) and 12 years experience as a senior manager in overall charge of up to 250 employees.
What I/we do now is hardly rocket science by comparison, I picked it up myself by doing my own house without any help or guidance, other than a half hour chat with our local window cleaner (who now works for me) about where he got his gear from. We also do carpet cleaning, I basically learnt that on a two day course, then was out there by myself!
Yes window cleaners will come and go, but if you think you are the only one of repute out there and people are going to stay loyal to you no matter what you charge, then think again.
Someone with a bit of nounce about them in the Yatley/Blackbushe area will be reading this and thinking "I might have a go at that and only charge £10/house, £200-£300/day, that'll do me!"
I only started less than 5 years ago and others probably thought the same of me, however, I never assume that of any new starter and I price my work realistically and competitively.
All our window cleaners are on piece rate and earn well, we always ask the question whenever we lose a house, why it's been lost and what we can do to make sure no more are lost.
Watch your back Peter or others may come up and take your work before you know it!