I would say that REI when played more like a lifetime pursuit than a game of Monopoly can border on the boring.

My family owned a small piece of land in a very well located neighborhood and convince them to develop de project.

I hold a meetup group about once a month on the border of Gilbert and Mesa, Arizona.

Hi David,Welcome, here are some great real estate books: Multifamily Millions by Dave Lindahl The ABCs of Real Estate Investing by Ken McElroy The Complete Guide to Buying and Selling Apartment Buildings by Steve Berges Commercial Real Estate Investing by Dolf De Roos Trump: The Best Real Estate Advice I Ever Received by Donald Trump Tax Free Wealth by Tom Wheelwright Commercial Real Estate 101: How Small Investors Can Get Started and Make It Big by David Lindahl Raising Private Capital: Building Your Real Estate Empire Using Other People’s Money by Matt Faircloth The Definitive Guide to Apartment Marketing by Josh Grillo Investing in Apartment Building by Matthew Martinez Crushing It in Apartments and Commercial Real Estate by Brian H Murray The 7 Secrets to Successful Apartment Leasing by Eric Cumley 2 Years to a Million in Real Estate by Matthew Martinez Burn Zones: Playing Life’s Bad Hands by Jorge Newbery Commercial Mortgages 101: Everything You Need to Know to Create a Winning Loan Request by Michael Reinhard

Harry Borders and Surepoint hold a quarterly meeting as well.

The right ~2.3 acres should be able to fit a cul-de-sac and 4-6 lots for new homes to be built, with about ~0.7 acres left with the duplex sitting on it.

Figured the chances of getting military renters across that border would be on the low side, but it could be a possibility for cyber folks.

Seek some tax advice from good cross border accountant for your options.

Since you are in the area, I'd suggest going to the local real estate investor meetings, Diversified Investors Group (DIG) and Delco Property Investors (for Delaware County). 

Updated 3BR, 1BA twin on a cul-de-sac in Cheltenham, with good tenants paying $1450/month, but due for a $50/month increase.