Check out Craigslist and other rental sites aimed at renters and get a feel for your local rental market, where the roommate hotspots are and how the rents break down by room which is how housemates choose a place.

Even though these are not millennial hot spots for investors. 

Everything is clearly overpriced as everyone and their mother knows this is a hotspot for STR..

These lists seem like good starting points for vacation hot spots, but every town that has a major chain hotel experiences travel and therefore STR demand. 

I know that the areas such as Highland Park, Red Bank, East Ridge, and Rossville (GA) are pretty popular areas for investing. What other areas/neighborhoods are prime for investing in Chattanooga? What about neighborh...

When you get bigger, there are large investment companies (like for every kind of real estate investing) which rove the country looking for hotspots to add to their management portfolio.

@Harrison C. if you have enough knowledge, it usually addresses fear:)You might want to follow the "Deep Dive" series we're doing on our BiggerPockets blog about Metro Detroit cities, City of Detroit Neighborhoods and comparing Metro Detroit to other hotspots investors usually consider:https://www.biggerpockets.com/...

A few towns over the night life starts at 10:00 and it is the hot spot for mid 20’s crowd.

The cap rates are not cycled down as much either.AZ and Texas tend to be hot spots for investments these days.

I know city planning is trying to turn Warsaw Ave into a hot spot....even then, how do we know it'll go into fruition?