Can anyone help me ballpark a residential rehab?

[Amy M.]

Trying to make a decision on whether or not to purchase a total rehab. We have an FHA rehab loan and a decent amount of money (~$100k) - but i have no idea how to quantify the cost to do all of the work. Its a 2700sq ft brick colonial... what we know is there are foundations problems, mold on third floor and in basement, water damage on first and second floor, needs a roof, kitchen, windows. I am less worried about the cosmetics and more about whats going on behind the walls. Can anyone give me any advice?