I've own my house for 3 years. When the house was inspected, the inspector told me it would be at leat 7,000.00 to repair the crawl space. Thank God there is no mold, but the house needs to be reinforced. Some of the joist are sister. I've place a 6 mil vaper barrier on top of soil. filled in whatever openings were on the foundation, and also painted with water/moister piant. The crawl space is about 2' to 3' to 4' in some areas. I had the bathroom remodle when the contractor remove the floor. He discover the header joist was rotten. The header under the living room would have to be replace. I would have to remove my hardwood floor. There is no sill plate. Is it possible to raise the house and do area by area. I am just lost.