I had a good friend, inherited well, then amassed a substantial fortune owning numerous businesses. He bought an ice cream plant for a song & built a respectable machine shop in it. He bought a Fordson NAA GOLDEN JUBILEE tractor with a machine shop built backhoe. The transaxle was broken. He replaced the casting, felt the hoe was too big for the tractor. He installed the backhoe on a 1955 Chevy Wrecker. Called it the "TOW HOE".
First his father, then he was a collector. He loved old organs, steam engines, Victrolas, player pianos, player organs, popcorn wagons, etc.
By his late seventies he began some erratic behavior. He went on a three year buying spree. He started a few weird business schemes, buried an old oil tank he intended to convert to a massive steam generator to power steam engines. One plan was DUKW tours in Lake Champlain. He started being accused of approaching young girls, saying inappropriate things to them. Started feuding with neighbors.
When it seemed he had totally lost his mind, a couple who had been close forever, and his wife abducted him, and signed him in to a hospital. Ultimately the diagnosis was severe reaction to a non compatible combination of prescription drugs.
A month in hospital he was cured! He was himself again!
Sad events in life, he then had a knee replaced. It didn't go well, and he ended up an invalid. Moved to assisted living where he died a year later.