Excellent idea - retake any class once for nominal cost (and you've already got the textbooks).

Generally, universities are insolvent, being propped up by infinite government-backed loans leveraged against students' future earnings. In turn faced with an endless supply of funding, they've become wastrels and signed up for too many bills which they must cover by incessantly demanding more funding from debtor students. The model created a feedback loop that most universities will find terminal once policy changes out of necessity.

I'm afraid they will likely only hear "retake classes infinitely" as booting students severs revenue. Failing students however, makes that revenue renewable. Corruption is cancer both financially and morally.