Tosh
On 3 mornings a week i am sat about doing nothing waiting until 9.00 to do my domestics .
Now if i had an extra £24000 of shops i would be out of the door at 6.00am and i would have about £100 in my pocket before most window cleaners are even out of bed.
just think about it £24k of extra work that will not interfere with your existing work, to me that is a no brainer.
I would build up a good rapport with the customers then after 12 months i would band them up 25% , shops are usually underpriced and there is always room for improvement in the pricing thats, why my pre 9.00 am work works out nearly double my domestic hourly rate.
I agree with Ian , shops are just as loyal as domestics, I havent seen some of my shop customers for years, i normally do them before they are open and just post them an invoice once a month.