The City of Portland, and Multnomah County are more restrictive than most of the state for instance. 

I am moving from Kansas City Missouri.

Dallas is a city with a lot of potential to invest in real estate.

Before you get too far, get with the city/county and make sure everything is copacetic. 

Any city or area anyone has had success in recently?

If that isn't satisfactory speaking at a city counsel meeting about the subject would also seem appropriate. 

Each week, I analyze the MLS, exploring cities and towns across South Florida to identify areas favorable (or not) to short-term rentals.

That being said, there is a rather diverse property and tenant mix within Allentown, like there is in most cities. 

I could connect regarding refinancing and buying a new property in order to maximize profits and also talk regarding the upcoming laws the city passes regarding multi unit properties.

I would like to know how to read the market a lot better and learn how I can see wether or not a certain city is thriving or not, if where I purchase the duplex is thriving I'll just settle there and target SFH's there instead of moving out of state.