What can I say. I am impressed. Your interpretation is probably spot on.
The repair of the accordion definitely speaks of restoration. The restoration was cause by a negative incident which changed the whole spiritual course in the life of this person. The fact that you are in the dream and that you benefit from this situation speaks of this dream being about you. So I think you have it right by implying that the dead man and the negative circumstances represents circumstances and a specific incident and not people.