If I got the money I would host a massive LAN party in some kind of mansion, with different cash money tournaments for competitive games from all eras, a gaming rig competition where builders compete on performance and aesthetics, indie game developer showcase, catering, atmosphere models, DJs, a network operations center, and invite some celebrities as well... Would be sick.
This sounds a lot like Quakecon, haven't really followed it in 10 years but once a year in Texas there would be a massive lan with some tournaments and prizes for amateurs. You could BYOC and they'd have spots for you. Carmack would give the keynote speech sometimes as well.
I had been thinking of opening up a game store with a LAN / internet cafe segment (and a bar license, but only if you use your own keyboard / mouse, lol). I doubt it would be economically viable, so it's a thing for if / when I'm filthy rich. Ideally I wouldn't have to run it either. Anyway, lottery draw tomorrow, fingers crossed, lol.
