Question about Property Management in Lehigh Valley

[Michael Kunis]

I'm still in the deal analysis phase of buying my first rental and wondering at what point should I be getting in touch with a property management company. Additionally, would love to know how anyone has gone about finding property managers and if anyone can recommend anything in the Lehigh Valley. Right now I just have a list of phone numbers generated from a google search of managers in the area ranked highest to lowest. Thanks in advance!