No problem Paul. If you want any help with anything just PM me. I set my business up 5 years ago, now as bolt a on I also do carpet cleaning (past 3 years) which helps through the winter months.
One bit of advice I will give you, it's all about the rinse, specially on new custy property. Always make sure their frames are nice and clean on the first visit, and rinse really well. You might have to go back over the windows again after you have cleaned them just to make sure their clean.
Rinse, and rinse and rinse mate. Make sure your water is pure. I never ever go above 03ppm. In fact it's always 000ppm with the 4040 RO. I have also started selling pure water to local window cleaners/cleaning companies here in Leeds. 4p per ltr.
Darran