virtual assistant to leave comments on targeted blogs

I publish websites to market certain digital products on the Internet. I have access to a proprietary program that identifies blogs posts (and the like) that pertain to what I am marketing. By leaving a meaningful comment on a targeted blog, with a link, I get a certain amount of targeted traffic to my marketing site. I wish to find help with posting blog comments. The comments must be intelligently thought out, useful to the reader, and accomplished with good English grammar, punctuation, etc. Therefore, a good candidate will have excellent use of the English language, writing skills, vocabulary, etc. This isn't a spamming operation. The comments must be meaningful and on-topic. The comments are not long. As an example, I'd say the comment should be longer than a Twitter 'tweet' and, not more than a few sentences (if it takes that much to get a point across). The program is easy to use and will require minimal familiarization to get started. I will work with the VA at first and then cut him or her loose to work independently. Workload would be 2 hours/day , 5 days/wk or something very close to that. The hours must be spread out across at least four days to get maximum exposure to current blog posts. Progress reporting is part of the assignment. An image screen capture will be used to document progress.