Co-author required for a business category blog

I have a wordpress blog targeting business category and subcategories where I need a regular co-author (not a freelance writer) who should have personal interest in business research and writing. Author will get credit below each article in the author biography box. Writer should be:- 1). Expert in English & Grammar (my blog language). 2). Write 1 article more than 700 words on the daily basis (not necessary just give your 100%). 3). Each and every article should have related images (include as much as image and diagram you can use to make article more descriptive and attractive). 4). You have to fill description and keyword field for SEO of each article. 5). Marketing his/her article after publishing (includes social media marketing, SEO, commenting etc). 6). Your articles will go under review and only approved articles will be countable for getting paid. My blog URL - [login to view URL] Message me if you have any doubt.