You've been transported into a billionaire romance and are in the possession of an Amex black card. What's the first thing you're buying?

You know all those billionaire romances where the FMC refuses to spend the MMC's money, even though he's basically begging her to? Well fuck that; if someone's giving me unlimited funds, I'm damn well going to go nuts. There will be a dedicated building made specifically for Legos and books, secret doors and passages out the wazoo, the rarest Lego sets known to man on special platforms, and themed rooms for books organized by tropes filled with special editions with sprayed edges and gilded covers. Basically my dream life consists of Legos and books. If you get that infamous credit card, what are you spending with it?