What is going on in Milwaukee? What am I missing?

[Elliot Saks]

As a new investor in Southern California, I'm on the hunt for a midwest city to invest in where RCR on multifamilies is a little better.  I've been looking in Milwaukee and I keep seeing all these properties that look amazing on paper.  Like an 8-unit in a B area for $250-350k and will cash flow $200/door even after estimating high on all expenses and paying a manager.

There also seem to be ALOT of these type of buildings.  Before I start buying all of them (:D), I thought I'd ask here.  I feel like I'm missing something.  I know nothing about Milwaukee, so maybe some of you know what's going on.  Is the city trending down? Or is unemployment high?  Is there some hidden cost/drawback I'm not seeing?