My core investing philosophy is pretty simple, and has done very well across almost two decades and numerous cities:1) Invest in cities with population (and job) growth2) Invest in parts of the city where household income is near the median (or slightly below)3) Invest in properties that provide cash flow from day 1 Thank you for sharing that. 

Between July 2009, and July 2010, the couple used more than $761,000 from this hidden account for payments on an American Express credit card; car loans for a 2006 Range Rover, a 2007 Bentley Continental, and a 2008 Rolls Royce Phantom Coupe; household expenses; legal expenses; department stores purchases; and a bulk gold coin purchase.

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

The target customers are the unbanked and underbanked population, which is 30 million household in US.

I understand that the average household net-adjusted disposable income per capita is USD 20 519 a year.

How much is your household income?

Do you screen all adults in the household or just the person paying the rent? 

The story behind Rommel here is that he was in a very abusive household with some bad guys.

These markets often have strong population and job growth and strong rental demand.But the reality is that even in more affordable markets like Columbus, you'll need about $50k-60k household income just to qualify for a conventional investment property loan (this assumes good credit and reasonable debt).

San Diego’s average house hold income is about what you stated, but the median is a surprisingly low (considering US news and world report lists it as the most expensive US city) ~$100k.