Exploring your interest in a Review Service

Hi All!

First, A Quick Background On My Skillset:
My specialty is online Visual Communication. And I have a good understanding of the on-page sales process, expressing Unique Value Propositions, sales page design and layout, social psychology persuasion factors, on-page SEO, and other online marketing topics.

I've done online marketing and website/blog design/development/maintenance services for many years for my clients and written and self-published 2 eBooks on Visual Communication.

My Question:
All the above is to ask if you think there would be interest in a paid service to review people's web pages, report problems and suggest fixes? That is if the quality and value of the advice were quite high (quality being the critical element in any service).

To start, I've identified and listed 20 categories of web page things to review, with 61 individual items (depending on how much a customer is willing to tell me about their prospects, niche, keywords, etc.). However many categories can be reviewed without such special knowledge. I've done more limited reviews many times to get prospects interested in a web project proposal, but never so extensive and never as a paid service.

I'm thinking of a price point of $20 per page for Warriors and $30 otherwise. My assumption is that single sales/landing pages would be what online marketers would want reviewed, not whole sites.

Of course people can get free critiques online, but how professional are those? And I be willing to do free reviews to generate interest, gain testimonials and such.

What do you think?