Personally, David, after reading this very excellent information you've provided, I WOULDN'T TOUCH THIS PROJECT WITH A TEN FOOT POLL! But then, that's just me, the non-professional scardy-cat girl (the one in the yard with the cell phone).
And, interestingly enough, the part of the process that scares me the most, is the potential damage to OTHER parts of the structure that hadn't been considered or budgeted for during the fix-the-foundation phase. One of the things that Jeremy many not be considering strongly enough is how much that periferral damage may add to his overall budget. For that reason alone I would want a qualified, INSURED contractor doing this kind of work. He breaks it, he fixes it.
Jeremy, I really, truly, wish you luck on this. But, again, if it were me, I'd get a part time job and pay off the loan!