Has anything been done to stop water from coming in? Can you see the drain outlet clearly? How many post are there? Are they on top of or sunk into footings? Is there damage to the floor structure? I know...You'll have more for us this weekend. If (may be a big IF) there is no floor structure damage and drainage is taken care of, maybe just the post will need addressing(replacing). May not be cheap, but sure enough, can be done. Have fun...You may not want to premeditate too far, just yet.