Out of State rental purchase - recommended cities?

[Rajiv Bm]

I've decided to look to buy my first true investment property starting out with Out of State rental purchases (i am based out of California)

I'm having a difficult time deciding where I should be looking to buy. I'm considering either a small multifamily (duplex or four-plex) or perhaps a single family that will be easy to rent and cash flow. 

For those who invested out of state, looking for some guidance how did you decide on your market?