I'm in too(!)
I did get another email from ADAC. Seems the price I was quoted was without the VAT. Even still it would be under 400 euros pp for teh two days course. We can also have a breakfast and lunch and snack catered at the test zentrum for an additional 38 euros pp per day.
The only real hangup is they want ONE payment for the group class. Thats like close to 4K euros(!). So I am gonna have to talk to them more. Maybe since I don't think we will have twelve people is to do a school with some "German" students.