I have experience with both pdf and epub formats, and see no problem in converting your texts at reasonable speeds. I also spent 4 years in secondary school learning German, so while I won't pretend to be fluent anymore I will be able to understand a lot of what I'm converting for you, as well.
For the 230 page text I ask for $60, which comes out to around 25 cents per page. Please PM me if you have any questions about my qualifications. The two day limit is for the test project. Thank you!