Scott,Some things come to mind:No seasoning.Borrower has blemishes on the credit report/low credit score.

The reason is the vacancy rate is so low that tenants with a blemish find it difficult to rent c class and above. 

:Class A Properties:Cashflow vs Appreciation: Typically, 3-5 years for positive cashflow, but you get highest relative rent & value appreciation.Vacancy Est: Historically 10%, 5% the more recent norm.Tenants: Majority will have FICO scores of 680+.Class B Properties:Cashflow vs Appreciation: Typically, decent amount of relative rent & value appreciation.Vacancy Est: Historically 10%, 5% should be applied only if proper research done to support.Tenants: Majority will have FICO scores of 620+, some blemishes, but should have no evictions in last 5 yearsClass C Properties:Cashflow vs Appreciation: Typically, high cashflow and at the lower end of relative rent & value appreciation.

The influx of money trickled into the school systems, which have long been a blemish for South Carolina in national rankings reports. 

Many times these are brand new, that may have been dented, scratched, or have a blemish, etc, which then have to be sold as damaged, even though they are new and work perfectly fine.

But, that $6K one may actually be the going rate there... and, the Owner may also working on the crew that is doing the work, but they may be using "2nd's or blemished" shingles, but may not have true ROOFING insurance, etc etc etc...

:Class A Properties:Cashflow vs Appreciation: Typically, 3-5 years for positive cashflow, but you get highest relative rent & value appreciation.Vacancy Est: Historically 10%, 5% the more recent norm.Tenants: Majority will have FICO scores of 680+.Class B Properties:Cashflow vs Appreciation: Typically, decent amount of relative rent & value appreciation.Vacancy Est: Historically 10%, 5% should be applied only if proper research done to support.Tenants: Majority will have FICO scores of 620+, some blemishes, but should have no evictions in last 5 yearsClass C Properties:Cashflow vs Appreciation: Typically, high cashflow and at the lower end of relative rent & value appreciation.

Why is she/he staying and risking a pretty negative blemish on their rental history? 

In CA Once you hit 70 and have had your license for more than X number of years you no longer have to take CE your grandfathered in for life. at that point I will have had my license for 52 years and to date never a blemish on that license!

Calling hail hits blemishes.