As a commuter I try to work back to back three days. The most exhausting thing for me is commuting, so I try to minimize that. I have found the average overnight to be 14 hours ish. Usually one day in the paring will have a 17-19 hour overnight at some crappy place with a crappy hotel. It’s harder than it seems to make 6 day blocks because everything you’ll get when your junior is weekends, and everything in ELITT is weekends.