You and your parents should be aware that UCI adjusts financial aid if you live with your parents and commute.
Using the UCI NPC at http://www.ofas.uci.edu/content/Calculator_Dependent.aspx?nav=0 , if I put in some financial parameters that produce about $20,000 in grants (leaving about a $10,250 net price) for off-campus living, changing it to living with parents produces about $15,000 in grants (leaving about a $10,250 net price).
Obviously, this is based on UCI’s assumption that living with your parents and commuting is $5,000 less expensive than living off-campus (note that living with your parents is not free, in that you consume food and utilities, and have commuting costs). Actual costs for living off-campus versus living with your parents and commuting may be significantly different from what UCI assumes, so you and your parents need to calculate net costs yourselves.