If your partner lacks the ambition, confidence and courage to be CP or CFI then get another partner
The CFI is responsible for ensuring the quality of the school's training. This means supervising, mentoring and coaching the other instructors and checking the students are progressing.
It your partner is already a Grade 1 at that school they should already have some idea about where the problems are, know the instructors and students, and know what they would change if given the chance.
Of course if the school is one teaching large mobs of foreign-language students, then that is probably a responsibility I would run away from too
Some jobs just aren't worth the heartache.