You have to be careful to as you might have to add a fresh air intake.

Our plan is to buy a duplex and move into it, rent out (or potentially air bnb) our current house that is projected at least +$500 cash flow.

Basically, if the Army/Air Force tells you "I order you to move" (which happens every 3-4 years), you get to keep your STR for one more year but lose it forever after that.

I’ve been 86ing properties off my list when I see that they don’t have central heat&air.

Your duplex in El Paso needs a new Air Conditioner ($3500) and your house in Dupont needs a new roof ($8000).

I had just gotten off of active duty Air Force.

I had just gotten off of active duty Air Force.

They have an incredible setup, complete with the "nicer" unit in the home, central air, and an attic full of storage.

Unless your time is worth running a long distance Air BnB business or managing a construction project from afar, I see a lot more risk in holding onto the property.

But depends on your investment model and abilities.Either way, excellent invention and I would take it everyday over a standard central heat and air unit or window units or baseboard heating etc.