Thanks for posting your question on Trulia.com!
The answer you seek will depend on the area of Pittsburgh you choose to start your rental portfolio.
My office has a property management division that can answer them and help you start your portfolio prior to any purchase.
Same goes with the FHA203k question, I have a lender or two that I can refer you to for the correct answer since that is their specialty and things change in the lending world.
Feel free to reach out to me if you need further assistance.