I've been part of the production crew for small-time musicians doing once-off concerts (approx. 2000 attendees). Between artists (warm up act, main act, guest s

I've been part of the production crew for small-time musicians doing once-off concerts (approx. 2000 attendees). Between artists (warm up act, main act, guest singers, dancers) and crew, there were probably about 30+ people with backstage access that didn't work for the venue. I can imagine if it was a tour, where all of these people need to travel, then the cost would quickly add up. So I can absolutely imagine that medium to big acts would be quite expensive.