Been to a couple gran prix, it is not as fun as it seems attending in person. You can only see a small part of the track, so TV coverage is waaaay better to watch. Also noisy (though not as much as it used to be before they introduced noise limits, no earplugs were helpful). For that MC hotel, only the vanity factor is strong, but given that you already have unlimited money by design of the question - there may be better ways to show off.

Used to live in CH and here to make the same point: as the taxes are low there, alcohol (and, surprisingly, big TVs back then) were some of the very few things cheaper to buy locally. Do not think it changed now. Restaurants, on the other hand, were some of the most expensive in the world there.