Looks like Milwaukee made your list, even though quite a bit lower than Detroit.

Hey @Spencer Cuello, so you will find most of us aren't fans of arbitrage.I see you listed NYC so you know that you can't do a STR in the city unless you live there.IE: You need to be onsite, living in the same unit you are going to rent.As per usual...

are there any other platforms for such listing? 

I personally like to buy in towns/neighborhoods in which no new builds are possible within 10 miles because all the land is developed.

As far as meetups go, you can find a lot of local events posted here on BiggerPockets: https://www.biggerpockets.com/forums/521-real-estate-events-...I also have a list of Chicago meetups that I can share with you as well.

Many of the surrounding communitie are up and coming with a lot of developments happening. 

Generally larger commercial properties and shopping centers are easier to classify with hard and fast rules, but to the points above the residential areas really move very quickly and have way more nuance than most people care to admit.zip codes are generally way too large for my liking at least in my market to provide any kind of insights other than macro level economics but even then highways or rivers that cut through a zip code can end up with totally different trade areas.we can get pretty granular with cellphone data and with grocery center data to understand the trade areas and their true boundaries, but that kind of data pull is generally only cost effective for investors doing larger scale projects or developments, and honestly we still just end up getting on the ground and feeling it out, so I generally tell people that the money is better spent on a plane ticket and weekend trip in the area you are looking rather than any kind of "trade area" level data studies.and generally B class in 1 area means something different than another. 

If you are not attached to the duplex, could be a good time to sell to developers who want to convert to individual condo units.

We’re developers managing our own portfolio and don’t have any outside investors.

Should I just add them to my 'Cash Buyer List' and move on?