Magnuman,
Are you looking to buy the one in the boat trader? That's a hell of a deal.
I'm doing the same thing to a Spectra. Big difference though in what I bought a what this Schiada is. I started with a bare hull, filled the holes and am going from there.
Be a whole different story with the other boat. You would have an engine to use and you could sell the pump and all that hardware to some one else, but you'll have to re-do the interior after you re-rig as a v-drive. Have no idea how much it would cost to have someone good rig it out. I think I recently read where Wilkes said to do it right by him, or someone as good as him, it would be in the neighborhood of 20 grand,(maybe more?) starting with a hull that has had all the holes filled. Lots of work.
The only part I'm not looking forward to is flipping the hull over and recessing the bottom for the cav plates. I've done this before with a router and it worked great, but it's a real pain to flip the boat.
At the rate I'm going, mine should be done sometime around the next Winter Olymics.