I know this is meant to be a proposal, but my bid is also highly dependant on the number of articles, which you did not state.
300 words / news article sure sounds easy, but 100 of them might take a significant number of time. I should be able to complete about 10-25 articles, which depands on the similarities between articles, or if I need to do substantial research for each of them.
I have written many articles on various topics before (martial arts, housing, fortune telling, etc). So if you are serious and considering me, then let me know so I can send you a sample.
Cheers!