The second round may bring better results.
There are schools that are eager for homeschoolers, as I wrote before, but he certainly is not limited as long as he follows whatever is required or wise for a kid in his situation (and he has done well in college courses, great that he took them).
It is true that elite schools often have great financial aid, but there are many other schools that do, too, and some have both financial aid and merit aid.
In the chance that he does not get good news, there are many college programs he could participate in besides community college. Continuing education, extension and “adult learner” programs would probably be great for him. Harvard Extension is one. Lesley, Goddard, Union Institute. Or any of the many online programs given by privates and publics alike (again Harvard Extension, all of the others above, and state u’s in our state have online courses).
If he qualifies for financial aid, he might be able to transfer and still get that assistance with paying, but check to see the impact of being a transfer versus freshman for that. I know for one of mine, it did not affect her financial aid to transfer to another school.
He could also do a gap year, though it makes him another year older than peers in college. I know two young men who have done National Outdoor Leadership School wilderness training during a gap year. Or something else interesting. This could help with admissions the next time if he still insists on elite schools.
Again, if I were a parent, I would want to understand why the focus on prestige. Perhaps he equates it with quality, which is not necessarily true!
I like what quiet desperation said about what’s right for one isn’t right for another. We don’t know your son or your relationship and I am sure that letting him go down this road, as quiet desperation put it, was the right thing at the right time. We all struggle with when to stay out of things and when to intervene.
This may work out- hope it does- but if it doesn’t you might want to get involved actively at that point because the choices are overwhelming!