I'm going to speak up here and you're probably not going to like what I have to say...
...Don't buy a boat that is Ready For The Transpac.
Buy a boat that is structurally sound and MAKE it ready for the transpac.
You write that you're not an experienced sailor. The way you get ready for this event is by a. Sailing alone a LOT and b. Analyzing, installing, breaking, and fixing a lot of shightte. When something goes south "out there" you Need to know how to fix it. How are you going to do that without DOING it?
Don't buy a boat with a big keel bolt issue or a deck delamination issue, eh? Also don't assume you gotta have a hot race boat to do this race. I took a Santa Cruz 27 across and while it was a good boat for me around the Bay, I don't have The personality to drive that boat aggressively for 15-17 days. Olson 30s are great boats, so are Hobie 33s. Are they a great boat for YOU?
1968 Selmer Series 9 B-flat and A clarinets
1962 Buesher "Aristocrat" tenor saxophone
Piper One Design 24, Hull #35; "Alpha"