Baltimore Cash Flow - What's the Catch?

[John Fabros]

Looking at markets within driving distance of DC for buy and hold cash flow. From the high level data and also the limited research I've done so far, Baltimore seems to have an abundance of affordable high cap rate properties. Saw that some tax assessments might be high, but overall, investing in the area seems almost a no brainer. Looks like a good number of relatively affordable (to DC) places with over 10% cap rate in what appear to be stable/gentrifying neighborhoods. What am I missing? What are the local quirks that will sink me?