If you look at the one mile income radius and you see median household income at 45k, then take 30% of that or $13,500. 

Owner occupied united increased by 8.4%"Still, although the overall share of households that rented decreased, the number of rented units increased by over a million units (43.3 million to 44.6 million)."

The poster was asking about broken/damaged household items and guests destroying a rental. 

Real estate investing has been a passion of mine for time with my mother also having invested early on where I likely have gotten the love and desire to follow similar foot steps.I have taken last 6 months to educate myself and currently own a single family home as primary residence and would like to expand to multi family properties (2-4 units) for additional stream of income, not to mention potential tax benefits for long-term investing.Based on current living situation, I have a fair amount of equity established in my primary residency along with having enough cash to either pay off house completely or use towards investing in a multi family property.Given that I'm the sole source of income for our household with my wife being the home maker for our two kids under 2, trying to weigh out risks with getting started now or perhaps waiting. 

Those on other sources of government cash such as disability often may qualify due to overall household income. 

They have median household incomes of 52k and 55k respectively.

Median household income for 38109 is $35k or ~$31k after tax

Their income is only 3X rent, they lack credit history, and the household is much larger, which could result in more wear and tear.

Monthly pre-tax income for household (minimum $5000)7.)

I think what you're really asking is how to identify good value areas where rents may be trending upward but the prices still remain relatively lower.An important metric is tenant household income to rent ratio.