If you are transferring to AGC airport and are not exactly sure where to live or stay,
I found a hotel called Extended Stay America which is about 5 minutes from the airport. The location is in West Mifflin and runs for about 2000 a month. I was transferred here to help instruct and this location was a life saver on short notice and for early AM flights. Airbnbs in the area are more expensive than the stay at this hotel. Rental is as long as you want, but decreases in rate once the stay is at least 30 days.
Hopefully this helps you if you are new or transferring! Maybe you can split the room.