Foundation Issues in Wisconsin - What to do?!

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Hey all - I'm evaluating a property just south of Madison, WI, and there are obvious problems with the foundation. However, I don't know the solutions, and more importantly the cost. When I toured, a few things I noticed: 

• Blocks, which presumably were used to support the exterior walls, are fallen to the ground.
• Jack posts had sunk into the dirt floor in spots, and were not supporting floor joists. 
• Questionable exterior wall condition

Photos are attached - what would you do if you saw this property? Before I do anything, I plan to get an expert's opinion, but looking for initial feedback & ballpark. Are we talking $5k, 30k, or "wouldn't touch." 

Thanks!