old house, lots of work

[Charline R.]

Hey there,

 I got an offer accepted an old house. So before I had my inspector come by, I hade a reputable contractor out to access the crumbling brick in the basement and he said no problem fixing it for 20K. But my realtor is really afraid that I buy the house, and once the contractor starts fixing the basement he finds a ton more work that needs to be done that was not visible to the eye. 

My question is, what is the worse case scenario?

  Thanks,

C