There's rich, and there's superrich. This is a boat for the superrich. The superrich don't have to choose between a yacht and a penthouse, they have both in every city they frequent. They also do not necessarily use them themselves, the are often used to host and bribe (politician can have a month on the fully staffed yacht).
A friend used to be an electrician for a company building such yachts. Good money!
A friend used to be an electrician for a company building such yachts. Good money!