Allie, I don't think his parents let him go.  Parents have no control over their adult children who will do what they think is right.  I say shame on him for accepting that challenge.  No money in the world is worth going through the painful ordeal he put his parents through.  Now, their financial difficulties will be worse having to pay for his medical care.  I'm glad his parents will be reunited with their son and hope for the best.