OP, glad you helped him out because the FASA system can be difficult to navigate even for adults. Reality is, without you, chances are he would not be going but your son, even with you having to pay would be.
YES...it s frustrating. We get nothing. Our incomes are not that high, but Our net worth is, because we have made choices to become debt free, and invest in things that hopefully will pay off some day but have not not yet!!!
We know quite a few families where the mom is "single" but lives a two adult lifestyle. Their disposable income is MUCH higher than ours. Child Support has to be reported but most of the time that end at 18 soooooo, only bio mom's income is reported. Most got full rides. Don't think custody is quite the right term as that ends at 18, but rather "supported by". We are thank-full for Merit Scholarships, The wisdom of grandparents and our ability to save some toward college, but yes it can seem very unfair.