House off 3" from center to sides

[Daniel J Aldrich]

Soooo. I have a question. I am under contract for my first property. It is an older house (1890), and when doing a home inspection, we noticed that the floors had a pitch to them. I also noticed various cracks in some of the rooms. There was a small amount of water in the front of the house basement area which I attributed to negative grading in that area. The basement walls are also spray foamed. Due to the cracks in the sheetrock, and the other issues that came up during the inspection, I brought a friend of mine back to look at the foundation. My friend used a water level, and told me that the front to the back of the house is off by an inch. That doesn't seem to bad to me considering the age of the house. The thing that I am concerned about is that my friend said that I would have to jack the center beam of the house up, put in new footers and 5 new FHA posts to support the house because of the settling. Is this deal something that I should walk away from, or just try to require the sellers to fix prior to closing?