Best, most profitable region for rentals?

[Christopher Monsour]

Hi- 

Living in San Diego, I've decided that I want to pursue a portfolio of rentals out of state.  I'm mainly seeking supplemental cash flow so multi-unit properties seem the most obvious to me, but open to other suggestions. What are areas of the country that others have had success with and positive cash flow deals are easily attained? Given that I want to purchase several sub 100k properties in the same area, finding one "super" deal isn't as important as finding an area that offers many "good" deals. 

I'd appreciate any recommendations, or if anyone has info on a portfolio for sale I'd be interested in information. Thanks.