I don't necessarily disagree with you fully, but before teams can go from point A to point C, there is generally a point B in the middle. Also, take a look at the teams which scored 40+ in 2019. These are the tops teams in the country. Yes, it's a great long-term goal, but I think NU being in the top 20 in scoring offense is more attainable for 2020 and 2021.
https://www.ncaa.com/stats/football/fbs/current/team/27
Maybe point c = 50
