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.
I am not quite sure why the sailing community is so fixated on having limits and extensive restrictions to the equipment. This is definitely not an Olympic contraint. Look at all the money and design that goes into the Bobsled event. To carry the argument even further, I think we should make all the runners wear the same shoes, that would equal things up as well.
100K is easy to spend on a boat if you really want. Unless the event supplies the equipment and swaps out every race, there will be variation that is boat and not sailor related. Part of sailing though is fitting the sailor to the boat; Weight, sailing slyle, etc, etc.
The real question is how does this fit into this thread.... Sorry.
Matt