If your parents will only contribute $10,000 to $15,000 per year, a $30,000 cost of a UC would still leave you $15,000 to $20,000 for you to come up with. This is generally more than a student can be reasonably expected to self-fund ($5,500 federal direct loan + part time and summer work earnings).
Seems like you have plenty of company in terms of students who do not want to attend any school that could be a safety.