A rapid transit system will be needed.

They appreciate more rapidly when the economy rebounds also.

Positive cashflow creates a large snowball effect, because your interest cost and balance rapidly decrease every month in unison.

And while the neighboorhood appears to half a 50/50 mix of poverty and wealth, you can tell the area is gentrifying rapidly.

The market is strong and competitive and the local economy is growing at a rapid pace.

I am looking to rapidly buy more properties to expand my portfolio, which is why I have not built up that extent of reserves yet.

My philosophy and approach:I am set on rapidly acquiring buy and hold real estate.

Its very thorough, but like most systems, works best for the middle of the range of PHA sizes and extremes in rental variation, as the system doesn't work well in places where there is very limited data (many rural PHAs), markets with rapidly rising/falling rental prices (SF for example), or places that have complex neighborhood divisions and wide range of rental cost within their jurisdiction (generally big cities). 

Nashville for example in no way checks off the public transportation box and the highway infrastructure is already showing stress from the rapid influx over the last couple of years.

As for multifamilies, we have the occasional great tri or quad but there are tons of duplexes on the market, many of which are in areas that are redeveloping quite rapidly.