If your sister is into Warhammer, she really is one of a kind. Warhammer is geared towards the male brain, it's the tabletop version of heavy metal. Not only are you paying DSP amounts of money for minis of buff men and scantily-clad women, you're doing it so that you can pit them one against the other in testosterone-fueled strategic combat to determine which genocidal and racist faction gets to win.
I've seen a fair number of (actual) gamer girls but not really Warhammer. My RPG campaigns irl generally had maybe 5%-10% (a little higher in college) females and most were just drop-in players or the girlfriend of one of the players. Funny thing is the serious ones all wanted to play shit like berserkers and barbarians and half-orc assassins, usually male. None of them pooned out that I know of but that wasn't really a thing then.
You're right though that WH people are almost entirely male, with an even bigger preponderance of neckbearded turbospergs of questionable personal hygiene than other games.
Where the fuck did he get the money for all of those vehicles? His divorce settlement?
Frank is seriously well off. I'm sure some of it is family but he's a very high level patent agent (though not a lawyer as John sometimes lies).
As a patent agent with a Ph.D. in the field where he works on patents, he can command very high rates.
He was a senior patent agent at Morrison & Foerster, one of the premier white shoe firms in patent law (and IP law in general), for 12 years and has been things like Intellectual Property Director for biotech startups. So he probably commands something in the six figure range in salary alone, and for anything with stock he probably has vested options, I would guess at least in the mid six figure range.
So even though he's a screaming jackass who lives like a frat boy with his gay husbando, he may be a millionaire or even a multimillionaire. It depends on exactly how poorly he manages his money, and how much he lets John squander on consoomer bullshit.
In either event, while I talk a lot of shit about him personally, his resume is pretty impeccable.