It is a popular benchmark used in the measurement of an entity's ability to produce enough cash to cover its debt payments.I'm a newbie as well and still being a sponge. 

I now own a nice portfolio of income producing real estate – virtually all of it purchased with cash by flipping mobile homes in mobile home parks.

Airdna has true data sets of actual income produced over a certain period of time for properties listed in the search area.

@Dilini Sundaram, the answer would be no because each piece of income producing real estate you buy brings in MORE and MORE income.

Largely related to the affordable market, the healthy economy and strong migration trends make it ideal for entry-level buyers.Indianapolis metro area new-home sales have increased 2.9% year over year to an annualized rate of just over 6,600 units in June.

An ideal project might be 20 - 30 units, with a combination of healthy cash flow and appreciation opportunity.

a smaller rental property that is a buy and hold and will produce solid cash flow

They can produce great wealth, but they take a lot of effort. 

It would rent out for $2500 a month producing double digit ROI and over $600/month cash flow.

Back it up with comps that show a healthy margin.