Will support ever end? I doubt it.
Is money more important to her than the love of her children? She would say no, but actions say "I prefer Ben Franklin over you kids". When my D19 told her momster that the xmas clothes she bought were fitting right. Momster returned the clothes kept the $$.
The kids are looking at college internships in the upcoming year to supplement the income and save for college. Skipping a semester to save and regroup.
My s2bx has a large inheritance I can't touch but the kids can request financial assistance for college. If she says no (I bet she will), they will get her to sign a statement because her assets impacts their financial aid for college.
It will also reveal her true self.
I advised S22

university to see MH help. We pay for it use it. D19 goes to the same group as I, different Ts but we agreed they can share notes.