Obviously there is a lot of variability in costs depending on exactly what is needed an finishes you need. But my instinct is that you could get that done with the right GC for ~$75K, but if the guy is professional and does good work then he is going to be hard to find and in high demand. What I mean is, my go-to contractor could probably do it but only because I give him steady work and basically full-time employment... he would charge more for a one-time client.
So most of the bids you get around the $75K price will be from guys who won't perform the job successfully for some reason (slow, poor work, hard to deal with, requires lots of oversight, no permits, bid didn't include everything, won't finish the job, etc.). I would add $10K-$20K to your budget in order to find a trustworthy GC, especially if you are going to be mostly hands off.
If you are considering doing all of that work, especially if you are going to make it 'above average', you should strongly consider flipping it. If you are in a good part of Francisville and the rehab will be done in Spring/Summer, you should be able to maximize your profit by selling and then using that money to buy rentals in areas of Philly that have higher cap rates. Just a thought.