I am from the Racine area, live in the Milwaukee area and work in the 3rd ward, which is near the downtown area and has developed a lot in the past 10 years. Milwaukee is a great place to invest with lots of opportunities.
Some of the best neighborhoods I see that are developing include Harborview, 5th Ward, West Allis, The Village of West Milwaukee, Greenfield, Riverwest and Greendale areas. Areas that are hot include Downtown, Bayview, Brookfield, Wauwatosa, the Lower Eastside to the Upper Eastside as well as north of UWM. I am probably missing a few neighborhoods in this list but it’s a good starting point. I would also reference the Trulia crime map as it is a good indicator for the most part.
With all the new business from large to small they are helping to develope the Milwaukee area. Yes, Milwaukee is a segregated city and has had tensions for decades, but it is like any large city, each neighborhood needs to be looked at to see where the development is occurring and where it will be going in the future. If you are able to invest in one of the up and coming areas with a cash flowing property it will definitely appreciate from what I am seeing in the growth of southeastern Wisconsin.