I have done temp work for a major marketing company in the UK where I worked on a project very similar to yours. I have lots of experience with data entry and fact checking and pride myself on my attention to detail.
As far as I am aware, I should be able to complete this project within a day, but I am estimating at 2 days just to be safe.
I look forward to hearing from you in the near future. If you have any questions or would like to discuss your project further, I would be more than happy to chat with you.
All the best,
Anton