Lots of variables. If you are commuting it's a different game since you probably won't have 100% double commutable trips on a NB plane. Trip construction, days in the month, and ALV also have large impacts. Many NB trips end up paying avg daily guarantee of 5:15 a day. To get to the ALV you have to work 14-16 days which would give you a minimum of 14 days off and a maximum of 17.