I am pretty staggered that you haven't picked up more work, are you just canvassing commercial accounts??
If so, then I can understand your lack of success, commercial accounts are the hardest of all to get, by a long, long way.
Pick smart housing estates, or if you are in a position to, call on houses in the countryside, the more remote the area's the less likely they are to have a window cleaner.
I know, because I do live in the countryside, and though I now have almost no domestic accounts, (all commercial now) when I did have, a huge amount of them were in the outlying area's of the various villages around where I live (Chepstow, South Wales)
You must live in a strange area indeed (or have three eyes
) to struggle so vainly with so little result.
Try drawing a circle on a map of, say, 15 miles radius and canvas & leaflet drop every town & village in that area.
15 miles is only 20 minutes of travelling, it doesn't take many accounts along a route of that length to make the journeying worthwhile.
If indeed you are trying only to stick with commercial accounts it will take a long time to build up a round.
If you have the chance of buying a commercial (or mostly so) round, and it is paying £600 a week, then 8 grand seems a little on the high side, particularly if it takes 2 people to knock that out.
You need to spend a few days with whoever is selling it, see just how good the jobs are, how many hours a week it takes to earn said £600.
If the accounts are all domestic accounts, then unless the individual accounts have gold plated prices and it only takes one person 35 hours to knock out, then it is well over priced.
If you are canvassing domestics you should really not be having to many problems picking up work.
Just remember that you are not just 'selling' your skills to a prospective customer, you are 'selling' yourself.
Drss in a way that wouldn't offend an old grannie of ninety, don't chew gum or walk around with a f a g in your hand.
When people say no, smile and offer them your leaflet and card, invite them to think of you should their current cleaner let them down.
There is loads of work out there, over the years I have turned away enough work to build another round.
Don't lose heart!!!
Ian