Los Angeles, Hillside foundation problem

[Bruce Ng]

Hi,
I'm looking at a property with some foundation issues. 
Definitely a motivated seller that bought at the peak. 
What's the worst people have seen for foundation repair?
The house is on a hillside in california, so its a little specialized. 
Obviously I'll be getting an inspection and estimate but I just wanted to get a sense of magnitude before I put in an offer.
Any thoughts? We are expecting 100k+

Thanks!

Bruce