Hello,
First of all, good luck with your project.
Secondly, I do believe that I fit the requirements that you have stated below.
I have a myriad of different topics that I have written about, from economics to art and culture. I do like to base myself on the creative side of things, but I do not mind writing legislature and documentation. I have written 5k-10k works on either subject, so I'm sure I'll manage.
I am available most time every day, as I do not have a job atm, still studying. Despite that, I have written scripts for a few amateur movies, articles for political discussion and am still a lead writer and editor of an online based community.
What is the range of the topics you would need? The genres and subgenres? And of course, how large are the articles supposed to be?
Best of luck to you.