Stuck in a rut/need investor advice

[Bart J. Olson]

I started out with 2 duplexes and then bought a house.  I sold my 2 duplexes (mistake) in a 1031 exchange for one duplex.  I want to sell my house, get out of the mortgage, move into my current duplex and use that money from the sale of house to invest in.  I want to invest in MF, but the area that I live in does not have a lot of inventory and is competitive.  
Is out of state investing a wise idea?  
I guess as I am writing this, Im not entirely sure what else I would want to invest in!  Just putting this out there to maybe get a few ideas and meet new people/friends that are like minded!  

Thank you