There are no real differences in expenses in either trad or wfp, that's how your catch out the Walter Mitties on here.
The biggest yearly expenses in window cleaning are holiday pay, insurances and fuel all of which you get with both methods.
Yes you could use a family car if you wanted to trad as cheaply as possible but most need second vehicle
which is another expense shared by both methods.
Expenses over the past year or two for me, WFP, that wouldn't apply if I was trad. In no particular order.
Filters
New membrane when I contaminated the old one
Resin
Charcoal (for my filtering)
New pole to replace worn out pole
New brushes
New hose
Water (metered, it's a lot of cash)
New transfer pump
Electricity costs (booster pump 1kW, transfer pump 900w)
I know trad guys would have some expenses I don't have but not comparable.
I must be a Walter Mitty, too, to have come up with that list without really working at it.
Vin
Take your expenses over a 5 year period and what would that list actually cost you ?
Yes wfp might cost you a few quid more than tradition methods but it not the thousands per year that some
try to make out.
I know there will be exceptions to the norm, premises water meters and so on but I'm talking about the average
one man window cleaner.