I don’t think it’s just a cost to the city. My family stayed in a downtown hotel, ate dinner and lunch in Baltimore. The hotel and the others around it were completely full, mostly of runners. While I’m from out of town now, I did live there for almost 10 years (and remember getting shut in my place those mornings). There were a ton of police out and I can only imagine the cost of that, but it may be that the high entry fees cover at least some of that. And it does serve as a great PR event for the city.