Do or have you known a hoarder?
My grandpa was a hoarder. We had a big piece of property on 3 streets in a regular old residential neighborhood. Half of it was the house and yard, and the other half was “the lot” as we called it. On the lot was a 3 car two story garage/barn type thing. It was packed full. The yard was full. If he saw something interesting in the garbage, he would take it home. Garage sales were his favorite thing on the planet. The town constantly threatened to lock him up if he didn’t clean up. And my dad and I lived there to help my grandmother with him (rapidly declining dementia too)... so the neighborhood kids made fun of me a lot.
When he finally succumbed to the dementia and we couldn’t take care of him anymore (he wandered off a lot), and he went to a nursing home, it took a couple of years to clean it up.