Real estate in Nashville has never been hotter and, while no one can predict the market, I have concerns about a potential economic pull back and losing value in our home.  

We were originally interested in SFR's, but have found the economics to be better on multi-families.

Cashflow, Location, economics development, vacancy rate, employment.

We both still work full time and will for the next seven years barring our health stays good. 

However, besides vacancy rates, I would contend that the education level and economic status of the populous isn't necessarily a gauge on what makes an area a good investment.

If your employer is paying benefits like health insurance, retirement match, dental, vision, disability insurance, etc. increase your $40,000 salary by about 25% to cover that part of your compensation package.Real estate agents follow the 80/20 rule.  80% of the commissions to 20% of the agents. 

Do you want economic freedom? 

The closest Wal-Mart is about 22 miles east, in Moberly, which says to me there's probably not a lot of economic activity in Salisbury. 

Based on the economic data I can gather, is this market poised for long term growth?

You need to look over the financials, the budget, and the reserve study to understand the financial health. $125 sounds about right or possibly low.