I could imagine ordering a new boat soon. Delivery time is quite long, one year and more.
It's only that I have no clue how much (in percentage) is usually paid for the yacht during the different phases of the construction process.
My experience has been 15% down for the initial order, then another 15% at some intermediate point, 40% with about a month to go, and the 30% balance upon receipt. YMMV though.