Larry Ellison is disgustingly wealthy. Co-founder and CEO of Oracle, he has billions at his disposal, and Forbes listed him as the fourth richest man in the world. You might think that a man with such an enormous fortune would be extravagant in his expenses… and you'd be right.

Word came in recently that the billionaire has bought Lanai, Hawaii's sixth largest island. The 140.5 square mile island has one school, one city, some luxury resorts and golf courses, and a population of roughly 3,000+ people. Sale price? Reportedly $500 or $600 million dollars.

Of course, this isn't Ellison's sole example of excess. He used to own the world's eighth largest yacht, which boasted 80 rooms, a theater, a basketball court/heli pad and 40+ crewmembers. (He sold it in 2010 for $300 million.) He also owns various real estate, airplanes and a fleet of luxury cars, including a McLaren F1 that's worth nearly a million dollars. But that's not his favorite ride; it's the "economy car" $100,000 Acura NSX, which he often picks up and gives away as gifts for his buds.

So if you ever wondered what could come of amassing a monster tech fortune, there's your answer. Just found one of the most successful tech companies in the world (and don't let it go), and you too could become lord of a small citizenry and cap off an extraordinary list of possessions with your own island fortress.

What would you do if you had billions to play around with? Share your fantasy wish list in the comments.

[via L.A. Times, Geekosystem]