Thanks to those that have responded. Here’s some additional comments:
We are not even in escrow, or even close at this time. So my questions are about how to get a ballpark idea of cost. (And don’t worry SK I’m not going to trust anyone’s opinion of what it should cost, only looking for suggestions on how to get a reliable estimate from someone who would actually know.)
There are no soil reports. Doubt if we could do any drilling/soil sampling until after close. So as much as I like the idea of doing something like that, not sure it’s possible. Might be able to do it while in escrow, not sure.
The idea of hiring a civil engineer/soil engineer is a good one, and would probably be worth a grand or two if we got into escrow. (Maybe could get in escrow with contingency about soil report. Seller’s might not agree though.)
I’d love to steer clear of houses with foundation issues, but the houses with great views that are fixers in our area all have serious foundation issues.