I have a home in middle Georgia near Robins Air Force Base. 

It will require new split-system HVAC for each unit, which will provide forced air heating and cooling.

You can make minor adjustments based on the type of appliances (dishwasher, clothes washer and dryer, air conditioning, etc.) and the size of the rental.

I found the Bigger Pockets podcast when I was sleeping on an air mattress on the floor of my first (live-in) flip because I moved out too early and the closing fell through.

Quote from @Jeff Copeland: The law requires you to provide heat, but it doesn't typically say how warm it needs to be in each room.First, I would ensure the window A/C unit is covered so cool air can't leak in around it.

Is it legal to host Airbnb in Lowell MA?  Do you need to obtain a permit to do so?

are those air conditioners sitting on plastic?

Keep in mind they need new ductwork transitions, PVC flue and air intake and will alter gas fittings and electrical.

@David Frost I need to have a window air conditioner installed.

I recommend doing that near Nellis AFB where you will be able to rent to Air Force Personnrel.