Well, if I may do some plugging:
Canonsburg, about 15 miles south of Pittsburgh on I79, 10 from the airport, has a Super 8 so you could do 4 people to a room for about $20 each/night.
St. John the Baptist Church OCA, All Saints Church, GOA, are within two miles of the motel, St George CHurch Antiochian is about five miles.
Holy Cross Church, GOA in Mt. Lebanon is having its Greek Food Fesival Jun18-21, it is about a 10 mile drive.
Camp Nazareth is in Mercer, PA is about a two hour drive from Pittsburgh
Antiochian Village is in Bolivar, PA a few miles past Ligonier is about a 1 hour drive from Pittsburgh