Checking that cart feels like a treasure hunt where I'm the pirate with no map.

Figure out how many cups a day you're actually drinking to burn through two creamers a week. Do you make coffee at home every single morning, or is there a drive thru stop in there too?

Your nephew is onto something but the money angle gets tried in Batman: The Animated Series, the episode where he funds a rehab program through Wayne Enterprises and it gets hijacked by crooks. That is the real answer and it is boring on purpose. Gotham is a pit because of the mob, dirty cops, and crooked judges, so dumping cash in does nothing but hand it to the people already running the place. Bruce knows that, which is why he puts on the suit. The kid is not wrong that he could do both, but the comics have shown a dozen times that the money alone just makes him a target.