SF is expensive, but its worth it. The climate is near perfect, its mind blowing pretty, every major art, big schools, beaches and great food. It also has a unique social atmosphere. However, its low on auto ownership. LA is a bit harsh in places, other places like Marina del Rey, or Santa Monica are great. Lot more cars in LA, and I would think more chances to find work. Given the state of auto repair in California however, it would help if you spoke Spanish.