When is it time to move on?

When do you guys typically move on from a rebuild? I’ve been rebuilding San Diego State and am gonna play in the natty tomorrow for a 3peat. All my grades are B+ or better except for team prestige. Every year except for the first I’ve made the playoffs and won my conference championship (mountain west and first year in the pac 12 currently). My overall is 90 or above in all categories and my team is just dominant. Went 9-4 year one, then 12-2 the second and have been undefeated since. When is a good time to move on? I typically stay with a team 5-7 years or so