Hi,
Your project sounds very interesting and I'd really love to work on it.
As for my experience, you can see for yourself that I've worked here mainly as a content and article writer; but, I've also done some VA work, which included blog posting, forum posting, data processing and entry, etc. It hard to estimate the time needed for this task, but I believe that it would be faster after a while. For start, two hours, with rate of $4/hr.
You're welcome to check my reviews and should you have any questions, I'll be happy to answer.
Kindest regards.
Milan