I can imagine that with WFP it would be possible to earn a fairly large salary in the London area. I have just converted to WFP and it is starting to make a significant difference to the amount of work I can get through.
If I was pushy enough and was prepared to put in the effort, and if I was also prepared to work weekends, or Saturdays at least, I could probably earn close to 30k a year, which would be doubling my current income.
I am content to work as few hours and days as I can, I like my leisure time, if I can earn 20k I will be happy.
With the WFP I shall rarely be climbing ladders and risking me neck on a daily basis anymore, and the ability to earn my money will be easier now.
In London I would have thought it quite possible to earn double what I could potentially earn in my neck of the woods, but it would still take considerable effort to do so, or so I would imagine.
I do know of one firm local to myself that started using WFP only a year or two, they now have over 2000 domestic accounts and a great many large commercial ones, they have several large vans fully equipped with WFP, comply totally with all health and safety aspects and turn over vastly more than 60k a year.
I have to say I take my hat off to them, or would if I wore one! They are a true inspiration, if you have what it takes then you can really hit the heights, even with window cleaning.
But it is still a very physical job, a tough change of tack for someone who may have had a sedentary job for many years.
Ian