Hi,
Your project really sounds interesting and I would love to work on it. I've worked with Wordpress plenty of times and am well familiar with the process of uploading the content. With Facebook - what can I say - using it on a daily basis, I'm even more familiar with it :) I've done some elements of marketing and SEO strategy, but I expect that you have some specifics to share with the freelancer you opt for, so... I would like to hear about these :)
As for my other experience here, I've mostly done writing of content/articles/blogs/product descriptions/etc. I've also worked as audio/video transcriber, translator, and data entry specialist.
As for the payment, I would like to suggest this to be an hourly project, since it's a bit difficult to say the precise fixed price for a monthly engagement due to diversity in tasks. So, if you're interested, I charge $6/hour.
If you have any questions about me or my work, I would be happy to answer. In the meantime, check out my reputation and kindly consider my bid.
All the best!
Isidora