There is a significant crack in an outside wall of the foundation that I still need to have someone evaluate.

I think regionally things may be different as I am yet to find the issue NOT surface.  

There is still some value there although distressed unless its a tear down in my opinion for the foundation and exterior walls if salvageable .

It looks like a great idea on the surface but the numbers don't stack up from a risk/return point of view as far as I'm concerned (it could be different for you depending on your return expectations).

Jaron Walling said something that caught my attention, "search for and buy a bad roof, leverage it during the negotiation"....especially of the property has been sitting on the market longer than normal for the current market, a "bad roof" might be a gift from the real estate genie.My point is this: get good at estimating and fixing a bad roof (or any particular problem found with most houses that sit on the market longer) and you'll get comfortable buying/fixing properties that scare off other buyers. 

I would be surprised if the city *doesn't* require the walls to be opened.

The dog bit into the blinds, broke the TP holder off the wall, and scratched up the door and frame.

@Jaron Walling I appreciate the response!

Quote from @Jaron Walling: This question seem pretty naïve for someone that's flipped about 30 houses. 

they said around 90% of market value.I tried to get them to understand that this property needs a LOT of work, almost a full gut, some holes in walls (small) old carpet needs to be ripped up, i mean like the works on this thing, you can prob get away with touching up the kitchen since its real hardwood and the bathrooms as well but this prop needs at least 80k.Found out owner actually owes 140k on property, and zillow is zestimating it to be 127k.