Help with this deal, foundation has sizable crack

[Chad Bauer]

I have a short sale under contract and currently working with the bank to reach an agreeable price (I'm at 60k & they're at 85,601.12, seriously they put the 12 cents). The house has a ton of potential, needs about 50k in repairs with an ARV of about 220k. As stated in the title the repair that concerns me is a large horizontal crack in foundation wall. My main contractor says because of the location this can be fixed and shouldn't be a problem. My concern is getting into this and uncovering some much larger (and expensive problem) or running into a problem at re-sell?

I can provide more detail if necessary but I'm looking for someone with some knowledge to advise. Much appreciated.