For example, imagine if the GC walks away and you have to find another GC and then you have to start managing the job? 

I can only imagine the sticker shock for people looking from SoCal.As more and more young families catch wind of the far more affordable pastures out here in Phoenix, they'll just keep on coming.

This is a very well to do area, you must have connections in finance realm that might be able to get creative with the numbers, or personal connections that would be willing to ease the burden for you over the short term and get a cut of your profits on future flips where you stay within your profitable sweet spot.Your other set of possibilities are legal, and that is really something you need a good PA real estate attorney to pour over your loan docs to see what your options are. https://www.foxrothschild.com/gregory-j-kleiber/

You obviously have given attempt to notify them, so would imagine that you have find everything possible for this emergency entrance. 

Forgive me in advance as I'd imagine this question has been asked and answered before, couldn't find it myself.What is the best website for researching cities, neighborhoods, average income, crime stats, average rents, etc. 

Also, look to see if there are any new businesses in the area.Being from Seaside, I would imagine you would do nicely with AirBnB.

I imagine this will involve public works considerations and figuring out some work-arounds with zoning.

It hasn't made sense for the people I have talked to but it may have been around $190k at that point.I haven't seen interior pictures but I imagine they are very small units and the place is very chopped up. 

Now the other lamdlord may get your tenant in one of thier units as a result but if it is truely the market you will be able to get someone at that price or you can renovate and command the higher rent but i imagine that is a costly renovation.

Both were in the worst condition imaginable.