When you have unlimited money and limited time, the obvious thing to do is to purchase time with your money. (Assuming this is allowed under OP's rule.)
I mentioned flying on a private jet above. The objective is not luxury (although being able to watch whatever movie you want on your flight would be nice), but to cut the time you spend waiting. There are other ways to cut "dead time" by paying extra money.
But there is a limit to that. Suppose you live in a mansion, you need to hire people to take care of the place. That means you need to manage those people. If there are too many of them, then you need to hire someone to manage other employees. Either way, it can be time consuming. So I wouldn't be interested in a mansion even if I could afford. I would not need more than two cars for the same reason. I might need the second car as a back-up in case I cannot use the first one for any reason, but the third one and beyond will only consume more time without any additional value.