High-stakes gambling. Play like shit, assuming that winning would count as not having spent the money.

Shouldn’t be that hard to get to bigger and bigger tables when you’re just literally throwing money away and losing on purpose.

Edit yeah the text pretty clearly said no gambling

Also, couldn’t you hire a personal servant? No owning, no buying.

Rent all the fucking hotel rooms. Here’s just one that’s 100k a night. https://www.architecturaldigest.com/story/inside-the-most-expensive-hotel-room-in-the-world

Or you know, go for an entire island.

https://www.privateislandsonline.com/search?availability=rent

Have a few yachts visit.

https://www.boatinternational.com/charter/luxury-yacht-charter-advice/most-expensive-superyachts-for-charter

Fly from casinos to other casinos and then to the harbor with your super yacht filled with hired servants (and is the cap you can pay others salary set? Foot massager, 10 million an hour?) then have a party on the island, take another yacht to another island and yeah I think 100 million in a month is very much doable.