Hello,
I'm Sherif Amin, a User experience designer and usability expert with +4 years of experience. I understood your problem and I'm suggesting this for maximum benefit for your website:
First, I will use the 10 heuristic evaluation model. You will get a detailed sheet with your website' problems, it's severity, heuristic violated and a recommendation on how to solve this issue. (This will normally be small problems you can fix)
Second, I will rate the following based on my experience: User experience, Interaction design, Information architecture, and visual design. Plus high level recommendations for each area. (This will be a more bigger problems that needs time and budget)
Third, You will get a presentation to summarize all the findings.
Fourth, I will provide you with a project plan if you are willing to revamp your website with cost estimates for each phase.
All I need will be three days to deliver this project.
Fifth, Take a look of samples from my auditing for other websites and applications:
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Looking to work with you :) Thanks