OK here is my guess
1, 10 Feet wide (or more as there is not that much Tacking at Texel)
2, Wings to increase righting moment
3, All Carbon construction - Target weight 100Kg (maybe even less, maybe 85 is possible!)
4, Tornado sailplan
5, Tfoil rudders to keep bows out (not a foiling boat, this is a step too far)
At 10 feet wide with racks... if there is any kind of breeze I suspect they will be spending more time in the water than on top of it.