From there, you can research through zillow/redfin whatever but your best bet would be to find an investor/agent (I a one but based in Fort Lauderdale) who can guide you through the process.

Warner Robin's is another great market...there's  an airforce base and it's in close proximity to Macon which makes it ideal.

The only reason I brought up that I coach in a comment was because I disagree with Henry's approach based on significant experience.

My endgame is to end up with $300k/yr in post-mortgage income in 20 years based on investments I make now followed by continued investments over the next 10-15 years own.

An attached ADU in the city I'm working with, based on my impression, is a new build with a shared wall to the existing property, and any conversion of existing space is JADU.

This is a post based off of curiosity.

We are based in NYC but are considering (as of now) locations outside of NY but within a 300 mile radius. 

It's a loan based on your revenues.

They are all disparaging the course based on superficial knowledge and assumptions. 

This will vary based on region but in general 2 – 5 points, 9% - 16% APR (meaning this is the annual rate so divide it by 12 to get the monthly interest amount), and documents fees can be from $600 – $1,900.