UBA1 is correct in one thing, two people do not work twice as fast as 1 person!
But I live and work around Chepstow, South Wales, there are many window cleaners in the area, and I only know of 1 guy (who is from just outside what I would consider my cachment area, but we overlap) who earns upwards of £200 a day.
Inside any of the estates in town you simply will not earn that kind of money, you just cannot go around charging twice what any other window cleaner is charging and hope to get away with it.
Around here an average semi will be around £7.50 or so, lower still in some parts of town, doesn't matter how professional you are you won't stand a snowballs of charging £15.00 as a minimum charge.
10 miles up the road is a town called Lydney, prices are tighter still up there.
Location counts for an awful lot.
I have now gone over to WFP (just over a year ago) and that has definitely made a big difference for me personally.
Prior to WFP I was only doing what I needed to to get by, was utterly fed up with climbing ladders day in, day out, I don't even think I would now be a window cleaner if I had not changed
I was doing 15k per year, that has jumped 5k within a year, and will probably jump another 5k quite comfortably. If I am submitting 25k to the tax man I will be more than happy.
But to double that? Or even treble that?
75 grand a year cleaning domestic accounts?
I believe that were I sufficiently motivated I could achieve 30k Any single window cleaner cleaning only domestic work and earning that much money is on serious money for a window cleaner.
That is the high end of potential earnings for one of us.
Very few will earn that.
Fewer still will earn 50k plus.
Some may well do so, but most will think they are doing well if they are topping 20k.
Ian