Anyone can wfp. TRUE
My five year old twins can clean ground floor windows.
The real question everyone should be asking themselves, IS
Am I any good at this WFP cleaning what ever technique you use?
How can we tell?
My Formula=
If you are good at it, you will be charging good money and never get any cancellations or can you leave them this time.
(unless its for a death in the family etc genuine reason)
If you are bad at it you will be under charging, getting cancellations and leave it's and always be out trying to replace the work you have lost.
Simples

Sleep Well!!
