If you type into Google search engine "gutter cleaning prices uk" but search under "images" it details flyers from company's
I found that when i'm actually gutter cleaning, people will approach you for information.
The camera pole set up is okay but also can be your downfall. In my experience keep your findings to yourself unless they are paying for you to do a survey. I don't mean that you say that the customers gutter are full up where in fact they're empty. The things i like to know is "are there any areal wires in the gutter, mesh, fallen roof tiles. Are the down pipes blocked, have they got down pipe covers and the list goes on.
If i know that a job is going to be easy and i'm not going to get my ladder out and it's only going to take a short time i explain to the customer that i have a minimum charge of say £65. Always email a quote because their's a a few days gap waiting for another company to make a home visit and make a quote
Most sole traders don't use a camera and will quote high whist yours is an honest quotation and remember the universe will help you if you help other people.
Don't quote low, quote fairly and take your time doing the job when you are in the learning stage.
Good luck