I would cut out all the stained sheetrock all the way to the floor and pull out all the wet insulation to make sure there is no mold. Then repatch. Buy the sound of your experience I would do all the demo and hire someone to do the patch
I had a 50s model International Harvester. I was gonna use it for art. I gave it to my buddy instead. He's got it running again, good to see that thing still going strong.