Will both parents be cooperative about financial aid forms and paying?
If not, then the colleges that require the non-custodial parent finances will not be affordable. This includes most of the private colleges with good financial aid.
If they will be cooperative, net price calculator use at colleges that require non-custodial parent finances must include both parents’ finances. (Note that USC, USF, and Occidental are in this category.)
UCB Regents’ scholarship could give him a need-based full ride (based on FAFSA using custodial parent finances only), but that is such a high reach that it is probably not worth the effort (there is otherwise no need-based financial aid for out-of-state students). Also, the UC deadline has passed anyway.