What classes do you have left to take? Shannon G is right in the sense that UCB Extension is EXPENSIVE!!! A 5-unit Bio 1B class cost me $1730 (w/ a UCB alumni discount) so yeah, ouch. Depending on what classes you have left to take, I would definitely consider picking and choosing which ones you shell out the money for to take at UCBExt (ie: anatomy courses, exercise physio, etc) and which ones you take a community college (statistics, intro to psych, etc.)
While of your schools I only applied to UCSF, I have yet to have a single school comment on the fact I've taken a portion of my pre-reqs at community colleges. Furthermore, I know for a FACT that UCSF accepts certain online courses from community colleges (such as Abnormal Psychology at Foothill college) so that is something to consider. Really, I would suggest calling up schools and finding out which courses they absolutely feel are necessary to get at the teaching level of a four-year institution. Of course they are likely going to say all of them, but you might be able to get a sense of where they are more flexible.
Feel free to PM me if you have any other questions. Knowing how expensive UCBExt is, well, I think that there are a lot of options depending on what you are trying to accomplish. Best of luck!