OK....he could be the nicest guy in the world but that's hoarding and especially with all the duplication. Sure it's his 'right' to collect and buy whatever he wants. But in the hobby, somebody like that keeps others from owning and finding stuff. However, if he's willing to sell or help other collectors, that's a whole other kettle of fish.
Local guy here had 15 Covairs. I was working with a teenager that wanted to restore one. We walked up to his door and politely asked if he might consider selling one. Ran us off, told us he was going to restore them all. Fast fwd 15yrs....he put up a fence around them so as not to be visible from the road, they rotted more to the ground, he died and they were hauled away. Who won in that scenario....the guy who 'possessed' the 15 Covairs, or the family members that had to dispose of 15 rotting covairs?
Just an opinion, YMMV.
Kevin