It's a little smaller than your range and VERY hard to find, but... if BEST
small fixed-keel sailboat for PNW is the brief, I'd look for a Wilderness 21
It's a freak. Has crossed oceans. Only 1870 lbs, so one person could launch it -- but it's like a mini Contessa 32
. Despite a 57% ballast ratio, it's fast (PHRF 219) as a San Juan 24. Which would be a good second choice.
As I've said before and I repeat. A real blue water sailor can sail almost anything across an ocean. A real sailor and I must add a very beautiful young women, sailed her Wildernes 21 "Lil Rascal" across the Atlantic around 1980 and survived due to her graceful tenatious love of what she was doing. I remember Amy Boyer when she was over due on a race to the Farralon Islands and the next morning we found her still sailing her Wilderness 21 freezing and partially swamped outside the Golden Gate determined to at least finish on her own.
And now gentle readers, my $.02 suggestion for a trailable boat with potential for modifications for ocean sailing is a Rob Roy 23. Not only does she have the potential to sail well, but she is real pretty. That alone makes her not only a pleasure to look at, but pleasure to have her perform.