I recommend doing it yourself and take your time. Do it exactly like you have it in your paper books. Line by line. Best way I think. Count up the total pages you have, and divide that number by the days you have before you need/want to complete it. Just do that many pages per day.

Also, I had a friend who paid a college student off of Craigslist to do data entry. Think he charged him like 300 for 7000 hours.