Foundation Issues / Floor Separating From Wall

[Account Closed]

Looked at a house that smells strongly of mold, and has foundation issues. One corner has sunk 4-6", and the living room floor on the opposite side goes up and down and up and down... The kitchen floor is so rotten that there are holes in it, and it's been taped off to prevent walking.

Biggest concern: the living room wall (opposite the 4-6" sunken corner) has separated from the floor. I've never seen something like that. Is that a major problem, or something that could be corrected with a foundation repair?

Doors and windows open and close fine.