4 blog articles for our website

I am setting up a second business that will require regular and potentially quite high volume blog writing services. I am looking for someone who can write 4 400ish word blog articles to be added to my existing companies blog. This will serve as a test for someone who could potentialy be writing a lot of blogs and various subjects.

Blogs will need to keyworded and obviously well written and informative. Cost is key as always.