Accepted into UCLA & UC Irvine but going to SDSU?

I just got accepted into UCLA, UC Irvine, UCSB and UCSD and am truly excited. Any student knows how gratifying it is to work so hard in high school just to end up getting into a good college. I mean, thats basically our only goal. However, my parents want me to stay in San Diego and go to SDSU, which I heard is one of the worst CSU schools. One of their reasons is that dorming is expensive, which I know is true, but are there any ways to side step that or at least lessen the payments? I may sound demanding, but its just that I worked really hard and have always wanted to go to such a good college.