Turnkey Vs full rehabilitation

[Tenzin Tomcho]

Hello 

I’m in need of few advice on full rehab multiple family rental in Philadelphia, PA area. Rundown house is located in up and coming neighborhood (bad to decent). Price is well below Market value ( est: 120k).

1) Where do I find a general contractor? 

2) What’s average price to fully rebuild a ground up duplex ? Exp: $$ per square feet.

3) what % of the market value should I be willing to pay for something that will need a major work done to be able be ready to rent?

Thanks in advance