A place you can post your job and hire freelance editors. With nearly 60,000 editors on the site, however, it can be a daunting project to find the right editor. To narrow down the candidates, you could make a detailed project description with required skills, language competency, and portfolio requirements. This should help eliminate unqualified editors. You can also include a random requirement like “Respond with ‘Hey, Jedi!’” in to find those detail-oriented editors who actually read your entire post and follow directions.
Obviously there is a big difference. I actually started with screenplays (with some mild success) partly due to hearing that as long as you have a good story, the grammatical errors won’t be a big deal. Well, that was not true. Maybe if a producer liked the story or I was already established but every contest I entered always came back with feedback about the grammatical errors. Even if I won or placed as a finalist, I always received critique on that. Very little is spelling error, it was more about structure, etc.