Documentation - help pages for website

I am looking for an experienced writer to support some of my projects on an ongoing and hourly basis. This is a great opportunity for the right worker to have a long and profitable relationship. Tasks will include writing help screens for existing web solutions, end-user documentation and extremely light tech writing. I am more looking for someone with end-user documentation experience than tech writing. Please bid what your hourly rate would be; the maximum number of hours a week you could work, and ideally.. samples of your documentation or links to your portfolio. Thank you in advance for your bid and please bid competitively assuming a long relationship. Thanks Ed