If you have free standing masts ( a really good idea with all the high strength fibres we have now) then forget about the jibs except a Storm jib
(very small but long on the luff for efficiency) between the masts remoovable for 95% of the time. If you put a forestay up you have to put a backstay and away you go. !!!! Ketch
is the way to go but with the area of the sail and height of the aft mast about 85 to 90% of the fore mast . The Foresail will be the primary sail and almost square a huge roach , or Gaff (Sheet?) to limit but not prevent some twist Look hard at wishbone booms they are simpler eliminate vangs and reduce the purchase
for the sheets
by half . Also can be lowered to the deck
and lashed down when not in use. No Boom thrashing arround injuring people at times of PANIC which will inevitably ensue in all our lives
You are headed in the right direction I am certain but take time to look at each solution. For instance I would not use Carbon for the masts "S" glass is almost as strong , Better impact strength is not a conductor and most important has a lower modulus so will bend like a wind
Surfer sail if you choose .
You owe me a fortune if you follow all that but just put it on the books
for the next guy Michael Pope Ex Engineer
, Aerodynamacist , Boatbuilder
, BUT NUTS! But enjoying life!