Best hull for autonomous wingsail boat

California to Hawai is basically following the old trade routed. That means it is downwind or a reach. Is your application for a restricted wind angle condition too?

 

And what will be the size of the boat?

 

for steering without appendages nor weights use twin wings as in the sailing MOOP https://www.youtube.com/watch?v=X9Hj3jcL5vk
for self righting, turn buoyant relatively broad wings perpendicular to relatively slender lw hull with weighted (batteries) ww ama.