Website & Graphic Design?

[george]

I am recently in talks with somebody about designing me a website for my garden business. However I am not at all technical minded and would like more information about what questions I need to be asking and also how much I should be roughly looking to pay.
I do not have any graphic design and would also be interested in finding out more infoformation. I have several pictures of work that I have carried out, and would also like to include my twitter feed to my website and of course include testimonials.

Any information and advice would be greatly appreciated.
Yes it is a young school leaver who has offered to design my website he is charging £225 and then £5 per month to the server plus £10 per hour thereafter for any changes I need to make.