Can a house with moldy, flooded basement be a likely fixer upper?
On some TV show I was watching, they showed the cleanup of a house with a severe mold problem.  The procedure was to strip everything back to the studs and subfloor and clean with a media-blaster.  Instead of sand, they used small dry ice pellets.  It basically took off the top layer of wood from the studs and rafters.  Since it was dry ice, there was no cleanup except the sawdust.  You are probably looking at doing something like this, and it won't be cheap.