This is said as a parent with a kid going into college soon. None of what I've advocated for there probably lands soon enough to make a bit of financial difference for me, but maybe for you.
I don't quite agree with Sanders' approach because I think it's very hard to make his numbers work without meaningfully detracting from aggregate economic performance.
But I also think there are far better measures that can be taken and I'm not sure he ever mentioned (some) of them: (1) adjust federal student aid/loan programs to prevent manipulation; that unregulated money has actually done more than to inflate college costs than almost anything else, (2) eliminate medical industry price gouging through regulation, particularly around Medicaid, Medicare, and ACA spend and perhaps more directly if legally viable, (3) incrementally (as opposed to wholesale) widen the social safety net from the bottom up in a fiscally responsible way, which is precisely how ACA was structured and deployed imo, (4) cut military spending dramatically. Maybe one day we can get to a place where this is possible.
Of course none of that helps any of us in this particular wealth/income gray zone :)
Good luck with the college financing though! Hope you figure out something that works.
Right now, Harvard for example has a large enough endowment that students could go there free indefinitely, but they still charge a tuition that then gets in-part funded by government backed student loans. That makes no sense to me at all.
The rest of it, I think I'm in agreement with and think that the Progressive side of Democrats and independent groups are the only ones seriously after that...
Some Scandinavian, French, Swiss and German universities are excellent. Scandinavian ones are quite inexpensive at foreign rates.