Memphis Invest has an excellent reputation. 

Join REI groups (use meetup.com), maybe even try working with some reputable wholesalers to see how they do things. 

I’m exploring it as an option, looking to establish my niche and getting ready to start. 

I am looking to possibly go back home to explore the New Hampshire Market as well as Maine.

@Carlos Araujo I agree with @Charlie MacPherson , get a local realtor who has a good reputation and get them to pull comps for you.

Here is a chart that you can build in an excel spreadsheet and enter the information to each of these data points for any city that you want to explore. 

I am exploring self-managing the property near the Disney area.

Or for contractors that come with spotless reputations and glowing recommendations. 

Credit unions can be a good source to explore.

I have spent the last 20 years living in Los Angeles and NYC, but am interested in exploring a much more diverse list of potential cities for "early retirement" (i.e. a place to live when I no longer require traditional employment).