How long was the leisure river constructed in the shape of the University's initials? This one is kind of egregious, but most will have an expensive stupid something.
Human capital is a big difference between Germany and the US. My wife attended medical school in Germany. Her year, veterinary was more competitive due to higher demand. If you select for the top n% and demand excellence lots of things are easier and cheaper.
What was the dropout rate from your program?
Lots of money is flushed down the toilet in the US, but the university already got paid so there's not much incentive. Much of the noise around affordability still ensures the university gets paid.