hello,
I can go through and do this for you, but given the number of sites you've got to do, it's going to be a good bit of work to do. I DO have a fair bit of experience working with WP and hacked installs, cleaning them out, however this is going to take a good bit of work, as I mentioned :)
If you'll look at my profile (https://www.freelancer.com/u/twhiting9275.html), you'll see 100% positive (5 star) feedback, high completion (I don't abandon projects, but there are times employers take work and cancel to avoid paying) and a link to my own site where I've done the same for better than 10 years now. Your project will be completed with the same diligence and persistence. Your task will be completed within the advertised period of time, and be given everything needed to be done right.
I look forward to hearing from you and working with you on this project.
Tom Whiting