Alloverit, love your post
If they are HGFA, then the CFI can "induct" another "instructor" to take passengers on TIF's only as long as that pilot has completed 100 hours of flight
Not sure if you were hinting what I was thinking
Years back the couple at Bright used to to the same thing and even came back with engines off from up in the hills. Unfortunately I believe they shut down after the CFI suffered a sudden illness. Lovely couple.