Well the yacht is now an 'investment' so you get to claim it on taxes and get an instant 30% refund.

Your buddy sets up a special company just to build it and stiffs all his employees and suppliers. Then the quid pro quo gets you another 30% or so back.

Renting it out for another 12mo/year earns the remainder back in a decade or two.

You can also 'donate' the use of your yacht to have a big party (also known as a charity ball) from time to time if you feel you are paying too much tax. Make sure the 'charity' is one owned by one of your buddies and is primarily used for lobbying or undermining competitors.