Erfurter Bahn Service is a German company that offers railway services, such as cargo transport but also heritage runs of classic German trains. I think this would be awesome as trains used by them are absolutely awesome and it would be a great addition. It would be nice to see their Eurodual, which is absolutely gorgeus (google "Erfurter Bahn Eurodual"), similiarily to their heritage trains. We don't really have a German heritage railway here so this would be great with the addition of some freight services.
I think you need to provide more information, actual route details to/from (anything over 50 miles/80km unlikely to be considered), the train types or units at the least a Wikipedia link. Above all, what "wow" factor this project might have to make lots of money for DTG!