Vetting an Unknown Neighborhood

[Jenny Kim]

I am relatively new to real estate investing, and I am looking to invest in single and multi-family properties (and one day apartment complexes).  

Property values in my neighborhood (and most all Southern California) are outside what I am able to commit to right now, so I am trying to find other neighborhoods in which to invest.  On the podcasts and in the forums, I have heard Ohio, Denver, DC, Texas and other places are more affordable and sometimes more landlord friendly.  

My question is what is the best way vet an unknown neighborhood/area?

Thanks in advance!!