29k to build an island at those coordinates? What a bargain!
Probably couldn't even ship one piece equipment there for 29,000 bucks, much less construct an island on the abyssal plain.
It's sort of close to the mid-ocean ridge down there, so maybe you can luck out and have some offshoot whip up a big hot spot volcano over the next 3 million years to build your island for you. Of course by then, it won't be the antipode to Helsinki anymore.
