Spending GBP100.000 should be no problem. Just invest in enough computer modelling and CFD analyzes. It dont have to make the boat faster, those writing the checks just need to believe it makes the boat faster.

To build boats for sale, you need to be a licensed builder. Otherwise, amateurs are (still) allowed to build one boat a year for personal use. I think they are arguing that "open" rules are bad for cost in the games while the tornado rules are "closed enough" to give everybody a fair chance?