I would like to hire a Copywriter

I am looking for writers with good knowledge of databases and data technologies or business aspects of data to create content for our product blog. Product is a database documentation tool. We deliver topics and basic outline of article but some research would be required. Copywriter needs to create a copy and some materials - screenshots, sample data etc. Ideally with some graphical work (infographics, etc.). Understanding of our tool would be required - some of the posts would be tutorials, how-tos etc. We didn't decide which articles we would like to outsource and which one do ourselves. It heavily depends on knowledge, creativity and writing skills of people we find. If it works we'd like to assign 1-2 articles a week. I would like to see some samples and an estimated price for 1,000 word article.