Rehabilitating an old house

[BigBrother]

Yes I know costs are all over the place but still...

I found a 2000 sq' house on a good piece of property. Home is 200 years old. It's been scabbed on both sides with additions. Entire house is unlevel. Piers are bowing up from the floor. A full 6" drop from one side of the room to the other. Trying to gauge costs to put in a viable and realistic offer or if I just need to scrap the idea.

Will need new siding, roof, floors, kitchen and the breaker panel is outside. Will also be tearing out walls and adding one or two. Siding and roof work is easy to calculate.

A positive: one side of the scabbed on additions looks solid underneath. The original foundations are legit rocks and mortar.

I am counting on 100k-115k in renovations on a very uneducated guess.