I've watched a few interviews with the son over the past few months and his chosen narrative is that he didn't care about comics at all and possibly resented them because of his father's obsession.
Regarding the dough to accumulate the collection, every explanation I've seen is that the father was a lawyer, as though being a lawyer automatically translates into being wealthy, which is obviously untrue. I'm not sure how he put that collection together and won't be paying $15 to watch the documentary to find out.