I'd buy a house, a bunch of video games, and a gun. Just before the clock rolled over into the 30th day I'd shoot myself.
That escalated quickly.
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Here's my stab at it, granted I don't know all the rules and youtube is blocked at work so I guess I don't get to know them
Buy a plot of land in the poor area of town (either it'll be an empty lot or an old building)
Clear out plot
Build grocery store there, hopefully a chain that I buy the contract to, if not then just a no-name grocery store will do
Hire enough people to make sure it's built within two weeks and ready to open
Buy a bunch of inventory
Hire grocery staff to run the place
Sell the land and grocery store for pennies on the dollar to the local food shelter (it should count because I'm not just giving it away)
Be happy there's finally an accessible grocery store in the poor neighborhood
With this, I end up with no assets, and it doesn't count as a donation because I sold the place. Granted I don't think it'll eat up all the remaining money (after my charity and gambling), but I think I'd be able to use the rest of the money on renting a super nice McMansion to live in during this time (and hiring a bunch of staff for upkeep) or something.
Actually, I think if I rented out a luxurious enough place, and hired enough top tier professionals (like chefs, fitness people to whip me in shape, etc), sprinkled in with a few pricey as fuck vacations I could probably hit the limit without owning anything... I could rent an expensive as fuck car too

But I like the first scenario more
As for people asking, only my boyfriend would be confused but I think saying something to the extent of "look I know this is crazy but trust me, I'm an accountant" would get him to not be worried lololol