Well, hiring writer is the best but also a hard option. You need to carefully find the right staff who would help you complete the assigned tasks.
I recommend going to firms with a proven track record of dependability and proficiency in offering business consultancy and leased office staffing & management services. Staff leasing is better than freelance work because leased staff are permanent workers of a company and are easy to reach in case you need them. Freelancers do not have employers so they do as they please and sometimes cannot be contacted for various reasons.