Five years was my window, and I was hoping to be wrong, but it will likely take five years to develop on the LOS, both sides of the ball. We are getting ready for the third year and probably a little further along than most of us think. We had one hurt QB, a true frosh and one other solid QB, who got injured as well. Plus, our RB room was pretty empty and so was the WR room. More guys are showing up and the guys that were there are going to continue develop, both at RB and at WR. The QB deal will be better this year if 2AM can stay healthy and also since Luke will be available to use for more than four games. Vederal adds increased depth too. I think Logan will probably sit. I am hearing that he got banged up in high school quite a bit, so that makes sense to red shirt.
Relevant... what does that mean indeed? If the OP means National Title, well, that's almost impossible to put a time table on. All you have to do is run the table or have a SOS that's good enough to get the committee to overlook a loss. Then take down two VERY good teams. There are great teams that were in position for a run,, yes, I am looking at you Ohio State. One bad call, and no dice.
If the OP means conference title, then I am on that five year deal. A run at the title in the fourth year with a senior QB is very reasonable. The fifth year, provided a new QB, might make it tougher. But year six, with a returner and an even stronger program, maybe conference title and playoff spot.