There was a company in Norfolk called VIP BIN cleaning that did my estate, always had my bin done, but in these super tough times I think a clean bin will be very low down on the list of things to spend money on, plus all the hassle.
I used to pay £3.50 6-7 years ago, so you'd certainly need to rethink prices.
If you want to earn money and get fit at same time, seriously consider dog walking, people will pay a lot more for dog walking than bin cleaning, can do multiple dogs at a time, a lot are too lazy, mate did it around 10 years ago now emigrated to a land where they have this big yellow thing in the sky and he doesn't have to wear thermal socks etc.
He was raking it in, and having to turn work away, within 6 months his pug 106 turned into a new M3, but 2 years after he left, he did this for around 2 years, wifey stopped working as well.
tabetha