Bob has it right. CrossPac was to be SF to Hawaii, then Hawaii to Fiji or Samoa, then to Australia. Near the end I dropped the Fiji/Samoa thing. It was to be three, 2,000 mile legs, roughly. It got you in Australia a couple of months before the Melbourne-Osaka so you could do that race as well. Nobody was much interested. I had three boats "interested" one of which was an absolute asshat of an Aussie who turned out to be all money and talk but no action. The other two entries were very competent, but obviously....
Matson serves Tahiti, so shipping boats back from there is quite possible.
Don't bother looking outside the West Coast of the USA and Canada for participants, there won't be any. Nobody outside this fringe community of bug-liters will give a rip so it will have to be an SSS event, or "Bob's Yacht Club". However, if 8-10 people sign up to to it, you might have something. I mean, in the end what you need for a race is boats that will sail from point A to Point B, right? Everything else is extra...the hotels, the belt buckles, the trophies, the big dinner, etc. etc. You don't HAVE TO HAVE any of that, especially the first time out of the blocks. Of course there will be people who think that if there's not a massive web site and radio tracking and naked dancing girls (or boys, if Synthia does it) at the other end, then well. *huff*...why would anybody want to do THAT? Also, of course, there will be dozens of people who are "interested" but who will do nothing, as well as a certain contingent of sailors with small boats who mostly talk a lot but never apparently DO anything, (Phil will be an exception) who will be all over the event telling you how it must be done if it's going to be a success.
I'm sure y'all can figure it out, though.
The question in my mind is whether or not it would pull participation away from the SHTP. I think you should seriously think over that point. Seriously.