No matter where you buy, you have to work with your Return on Investment:
I can tell you that Fresno has some of the lowest prices in the State, and, with all the upheaval, we have a lot of homeowners displaced from their homes.
I cannot tell you what the Vacancy Rate is, but the situation is very favorable.
In addition, because of the low prices, you may be able to buy two houses instead of one.
Around me - there numerous different areas. Pomona, Riverside, San Bernardino, Ontario, Some parts of LA, Azusa, Covina, just to name a few. In these areas,some are good & some are not. you do need to figure out the return on investment on any that you may be interested in.