My DH does building work for extremely rich people in London. The richest are royal family from another country, multi-billionnaires. They own a football club, travel by private jet, 200+ (empty) properties in London, only 5 of which are used daily. They’re staffed and cook breakfast in each of them every day as they never know if the family might show up. The staff used to offer the food to my DH and his builders if the family didn’t appear. Such a massive waste. They were very nice according to DH, the dad would dress very casually. The housekeeping and PA staff were rude and a bit bonkers, would phone my dh up in the middle of the night to ask how to work the new washing machines. They had Picasso’s on the wall, DH has been asked to rehang a few (and a few chandeliers) but no way his insurance would cover that!!
Another client were some extremely rich property developers who bought 5 London mews houses next door to each other who were converting them into a single property. Two of the houses were solely going to be used for their dogs!
All the rich people he works for like to change their houses constantly, if they change something and don’t like it they just rip it out and change it again. We’ve had two brand new kitchens for free (and my brother has had a kitchen) as they were going in a skip.
Recently he completely refitted a massive flat in London for a daughter moving there for university, flat renovation cost £3m. Daughter walked in when it was almost finished and didn’t like it, she wanted to live somewhere else. So the parents left that flat and got her somewhere else instead.