Best place to have a Duplex Property in SOCAL

[Bob Villa]

I am considering of buying a Duplex Property by Southern California.  Me and my spouse have a good credit and around 200k cash. Any suggestion as to where is the best area to look for one, considering cash flow? 

This is actually my first REI, and I heard that SOCAL is kind of hard to cash flow from compared to other states, is this true? - If not SOCAL, where is the best state to look for a Rental Property that can generate the best return? Thanks for your reply.