I have 3 college-aged kids and one nearly there. Their universal concern is the cost. It has become prohibitive. Colleges assumed the trend of charging $25k to $50k per year would be sustainable. They were dead wrong, especially given the horrendously predatory loans backed by the government and barred from bankruptcy. If we fix the college financial system, enrollment would likely skyrocket.
Also, in-state tuition for state schools is much less than $50k/yr so try going to Cal and/or your best local public school and supplement with self teaching (e.g. via public/free lectures from MIT)? The self directed learning/motivation is the hard part for many people of that age, but few have said living frugally should or would be easy.