Help David Rodge get Back Surgery

This is my son, David, at a job.His back (spine) has degenerative bone disease. A bone chip is putting pressure on a nerve in his leg. At any moment the chip could shift positions and David would be instantly paralyzed from the waist down. His MDs told him that most people with this problem are usually in the hospital when the doctors see them. David's MDs can't believe he is still walking. David has insurance but the surgery will cost $25,000. That price doesn't cover the other people needed for major surgery.David will also need physical therapy after staying flat in bed for a few weeks. He won't be able to work for at least three months. He is selling his work trailers to pay for the surgery but he needs the surgery NOW not when he has $25,000.Please help my son.