Great question by the way, many overlook the importance of the area vacany rate when deciding to invest. According to the most recently available data from the us census, the vacancy rate for rental properties in the city of Scranton is 9.3%.
As a property manager that works in the area I would say that this is fairly accurate. There are periods of time when the vacancy rate is very low 2-3% and as high as 15-17% but on the average for a whole year 9-10% is about right. There are numerous ways to curtail the vacancy rate.
-correct rental pricing
-good tenant relations
Just to name a few.
Also each property based on size location and amenities can also vary on the