I offer proofreading services costing 10-12 dollars/1000 words, depending on the depth of work required. I will ask to see a 300-500 word sample of the manuscript before I make a firm quote, which will include the starting and completion date of my work. As an example, a 50,000 word manuscript will take me around 20 hours (4-5 weeks {summer-2 weeks}) to complete.