It does sound pretty expensive, but there are more to shops than meet the eye.
You can be out very early in the morning, spend three hours doing shops then by 10.30am you can move on to your domestic work.
24k per year for 3 hours work a day is bloody good money, their ain't many out there earning that doing domestics all day long.
Who is to say you can't change the work around?
Who is to say you have to work 3 hours on a saturday?
I've no doubt that whoever has that work could easily cram more of it into a single day if they wanted too, and I'll bet there are only one or two shops (if any at all in fact) that HAVE to be done on a Saturday.
Shops are guaranteed work, come rain or shine.
And most are very loyal to their window cleaner too, you get a natural ebb and flow, you lose a couple here, you pick up a couple there.
I've still got some of my original shops from 23 years ago, hows that for loyalty?
AS David says, check it out more carefully, this kind of work, particularly if it is of long standing is way more valuable than domestic work, it's bloody hard to get even a tiny foothold with shops and other commercial work unless you buy in.
It might be expensive, but if I had the wonga I'd pay that for it.
After I had looked at it very carefully that is....
A big investment, so it needs looking at in very geat detail.
Ian