No need-based financial aid for out-of-state students at UCs or CSUs, and large merit scholarships are rare and super-competitive. Can you and your parents afford the out-of-state price?
Most UCs do not have business (UCB, UCI, and UCR do). Most CSUs do have business, and some them are not that difficult to get into. But most CSUs are heavily commuter-based schools, so they may not have as good a campus social environment for an out-of-state resident student, unless you intend to seek social life outside of campus.