@Mary Joe - I really like the Memphis market, the Dallas/Ft. Worth market for long-term buy/hold markets. I am also starting to invest in Nashville in Tennessee and researching Austin and Houston over in Texas.
Your question about Cash Flow has a lot of other detail that you should consider and maybe share before really knowing a market that fits your goals. Are you talking Cash Flow as a creation of using leverage? If so, you can find cash flow just about anywhere. It all depends on what price point you are looking at, what your risk tolerance is and how much you are willing to put down. I have been researching markets for a long time and thru my success and failure I have come to learn that the properties themselves and finding someone to help you if you are investing out of area are really secondary to researching a good market that fits your long term goals.
Every market is going to offer something a little different whether it is good opportunity in SFR or multifamily or good opportunity for short term investing while others are good for long term investing. You really have to know what your expectations from investing are and then find a market and/or strategy that fits those goals.
Good luck with your investing - Chris