understand that LA and B are really selective to transfers too. UCB, for example admitted 106 Biz applicants last year - LA, 212. See for yourself here:
https://www.universityofcalifornia.edu/infocenter/transfers-major
I would say, transferring to either to study biz is pretty unlikely, regardless of how hard you work and the grades you earn. DO NOT SADDLE YOUR PARENTS WITH DEBT TO PURSUE THIS FOOLISH COURSE.
Not sure where you are from or what your stats are but, the left half of the US participates in a program called WUE, where students from as far East as Colorado get discounted tuition at select public schools in other Western states. In CA, for Biz, these include Cal Poly Pomona, Chico, Sac and SF State, all of which have respected business programs which have much more obtainable admissions. UNR - a stone’s throw from CA is another. read about it here
https://outofstatecollegefairs.org/western-undergraduate-exchange-wue-faqs/
There are lots of good schools for Biz in CA, but without your stats i am wasting keystrokes - tell us more about your qualifications and what state you live in for more help.