Especially wear-and-tear on minions, the cost of heating enough lava to keep the underground waterfall running, the man-eating shark captive breeding programme and of course childcare (for when you absolutely must take your beloved spouse out to dinner to get away from all the screaming of heroic super spies being tortured or eaten by aforementioned sharks. Of course, children use up nannies so quickly in such surroundings. They take after Mommy and Daddy so much at such a young age
)
I just realised that's a metal drum. Oh my goodness!
