I don't understand why ppl think $10 K is a lot. It is Not.
I could probably to name a few dozens various (different !) ways to spend 10K/month. For each of them.
Even $50K would be not enough.
OK, you say no invest, no trade, no gamble? Fine
No crypto, stocks, real estate? FINE
No estate rent, no fancy cars/yachts? Fine

One of the first options could be - build a ham-radio SUPERSTATION, somwhere on the mountain top in Canaries or Cape Verde, and win #1 in world wide contests. Always. That is - year after year. Not, not forever, maybe 3-5 years would be enough.
That damn thing alone would require $4-5M on the first year, just to build. Or keep building it for 3-4 years. No maintenance included.
I know the feeling, when you push your foot-switch, and know you are the NUMBER ONE SIGNAL from your continent. And can RUN those QSO's at the rates your close competitors can only dream of.
The name of the game is RADIOSPORTS.
Probably the biggest arm-race game I can think of (and have ever tried)