Losing population, losing jobs, high property taxes, etc.

I visited a tiny town in the far north - Kaikohe with a population of 4500. 

Before the multifamily lovers chime in, this market is way different than California, New York, or any big metropolitan city with a large downtown population. 

A growing population is also important.  

I think there is a large percentage of the population that is meant to punch a clock and bring home a salary.  

Lack of participation, apathy, large tenant population. 

Look for markets with job and population growth, or gentrification in specific neighborhoods. 

But if you are going to use it, then it might help to identify what portion of the population might be able to afford the rent.

This means the population of millennial homebuyers will probably continue growing with the coming year and also beyond.HOUSING INVENTORYTime Money described another reason why a large number of millennials haven't entered the housing sector, which is that inventory is down right this moment, especially at price reduction points.

@Samuel Sedore What I look for when I'm searching for a place to invest - I start with cities with metro area populations upwards of 500,000.