Needless to say, Columbus will remain a strong real estate market for the foreseeable future. 

3.I can save up around $20k-$30k a year and Im looking to use about half of that for a down payment with an FHA loan, so the remaining funds would go into the property savings as reserve.

I know the book was published 5 years ago and the associated materials may be a bit outdated with the inflation that has taken place in the last 5 years.

Inflation adjusted his $3,000 per house was $400 in 1950 dollars.  

This way, even if the monthly payment remains the same, the amount you pay towards principal each month goes up. 

Most initial responses are people with inflated prices (higher than market value).

The “CPI rate” takes effect on each August 1 and remains in effect through July 31 of the following year.

And then rent out the remaining 16 units at market rent.

As illustrated in the diagram above, the investment city determines crucial factors: rents outpacing inflation, acquiring multiple properties with minimal capital, and the longevity of your rental income.

Here are a few thoughts of mine, based on your situation: DFW Market: Overall, the DFW area remains one of the strongest real estate markets in the country.