Cougar -
try this, figure the cost of your “really fast” IOM for hull and keel and rudder. Forget the electronics; forget the rig and sails. For sake of comparison, let’s call them a “wash” - same price whether a monohull or a multihull.
If you will agree, a “really fast” IOM might cost you $600 for the hull, keel and rudder? Do you agree?
If so, MULTIPLY the cost of the basic hull by three - this is $1800 - since it costs the same to purchase one or three hulls. Your IOM has 1 hull, the trimaran has 3 hulls!
You build your own boats, so do you really think the other two hulls will be included for free? Heck no, you will pay for the cost to design a slightly different hull design for the floats, and for a mold, and for the layup/fabrication of a float - TWICE!
You have the rig from your IOM. You are a boat builder. I can provide you with the plans.
Use your IOM rig on a MultiONE platform. It won’t cost you anything for rig and sails. If you can transfer your electronics between boats, that won’t cost you anything. If you build a foam hull and floats, covered with glass cloth, you should be able to do that for $25.00 a hull maximum. Now you have 3 hulls for a cost of $75.00 - and maybe another $75 for fittings, two carbon fiber cross beams @ about $15.00 each. You are saving on the cost of labor! The materials are not that critical. Tower Hobbies can supply you with an AM receiver, rudder servo and the 815BB arm winch for about $90.00 if you can’t swap electroncis.
The MultiONE Class was DESIGNED for this purpose - to let new skippers try out a multihull at minimum cost.
Now I suppose you and others can complain about the high cost of owning a competitive IOM (or a multihull). I have just provided you with a less expensive alternative. If you doubt this estimate, anyone can email me and I’lll have Jack Ronda reply with the costs he has in his MultiONE. And he did the rig and sails new - not from a 1 Meter monohull.
If you can’t shape foam, and cover it with glass cloth, then I suggest you come to the conclusion that you WILL pay someone else to do what you could easily do - especially if you have experience building a monohull with strip layup. THAT process is much more involved and time consuming than a glass over foam set of hulls.
I can also send you drawings to use if you want to build a “Box Section Trimaran”. Jim Lestos did one and it is viewable on the MultiONE web site using the link provided below under “multihulls”. That one is made out of balsa sheets and is even quicker/easier to build.
So, I guess my question would be, … if you can and have built a monohull, what is keeping you from building three skinny ones and tying them all together with two carbon fiber (or aluminum, or wood) cross beams? Seems like a challenge for you?