Most writing services are provided for 50-cents per word, and you can choose a target word amount ahead of time to lock in a fixed price. A 750-word document would cost $375 and includes several service components:
Review background information and suggested resources.
Interview key contributors including personnel from your
company, your customer's company and other relevant third-parties.
Write the first draft.
Edit the draft based on input from you, your customer and
other third-parties.
Rewrite until the draft meets the requirements of all parties
involved.
Monitor and facilitate the approval process.
Typical word amount ranges:
Case studies: 500-2000 words
Press Releases: 250-500 words
Newsletter articles: 750-1500 words
Note: For web text, brochure, and white paper writing projects, pricing is
determined on a project-by-project basis.