Thats amazing. Your son sounds supportive and like he's got a good sense of humor. Lol I like the way he thinks!
All around though, the idea of having a funeral of sorts for the you of the past seems like a pretty symbolic, freeing experience. Funerals are expensive, but maybe you could just bury a little chest with a picture that you feel represents the old you somewhere. Of course you wouldn't have to, but part of me feels like it would be an interesting experience.