Seems like a tough draw to survive for long as an independent once Sun Belt affiliation ends.
UMass, Army and BYU are Independent. Had Idaho stayed in FBS, they would be one, and frankly, maybe the 5 indies (other than ND) could have scheduled each other to provide 4 baked-in games. As it is, I feel sorry for your AD who has to do the schedule.
NMSU is a decent program--love watching the games on AggieVision on the satellite--but I'd have to think 5 years is probably the maximum time NMSU can survive. There will likely be some more realignment in 2023 or 2024--if NMSU can't get into a conference after the next round of realignment, do you hang in or toss in the towel?
Good luck and make a bowl in 2017!!