I'd buy an island in the sun, design and build a fabulously exclusive hotel, with all facilites expected in a 6 star resort and then build an open air discotheque on the beach. The DJ stand would be on stilts in the sea, so I could sit on the edge dipping my toes in the cooling waters in between tracks.
The dance floor would be a big 70's Saturday Night Fever floor.
My lights would hang from palm trees, my speakers would be held high by natives (aka roadies).
As for equipment - I don't really care. I'd definitely get Chris out to give me a quote though
There would be no alcohol, because I don't drink, no smoking, because I don't smoke, and no sex, because I'm married!!
Oh yes, rather than play tedious CD's, DVD's, tapes, records, MP3's or MiniDisk; I'd get all the original artists in a queue to perform on demand... "Right Madonna you're on next, sing Like a Virgin and then bugger off. Barry, you'll follow her with Copacabana. Has anyone seen Shane McGowan?"
Only beautiful people would be invited (no DJ's then!) and I'd have a tiny man welcome the planes in as they landed on the sea - "de plane boss".
What's really interesting about this thread is that even if we won the lottery and carried on with the most expensive, elaborate gear in the world, we'd still be playing Black Lace and The Gap Band every Saturday night!