Best locations to invest currently?

[Steve A.]

I have quite a few properties in the Indianapolis area, but I haven't invested since roughly 2014 due to focusing on another business. I'm ready to begin investing again, but I know things have changed quite a bit since 4 years ago. Back then it seemed like the best major metro areas to invest for CASH FLOW purposes were:  Indianapolis, Memphis, Kansas City, Oklahoma City, and maybe some cities in Ohio.  Can't remember if I'm missing anything.  I'm not really interested in anything other than major metro areas. 

What are the best locations to invest in now?  For cash flow purposes.