There are several good long previous discussion that you should read. Being a live aboard in the PNW his harder and more expensive than living on the dirt. Make sure while you are looking at boats to all so look at marinas as the marine and slip is usually as important to a live a board as the boat, because during the dead of winter you may have to use/depend on the marine. Make sure the slip at least had 50 amps 120 volts as you will use it all.
The slip is also important as willing the dock in the wind, rain, cold can be daunting and dangerous. Keep in mind if you happen to slip in the water your chances of pulling yourself out is low! So make sure getting on/off the boat and in/out of the boat can be done with one hand and NO wide spaces between the boat and the dock. Especially for females as they tend to not have the strength and cloths/shoes restrictive.
Being you are a live aboard 100% of the time and cruising a very small % the boats size, capability and basic creature comforts are far more important the electronics and even running gear. Basics like no leaks, dry, water capacity, sanitation, heat, refrigeration etc. Males put to much emphases on toys and not the basics. 50% of the newbie live aboard do not make it through the winter, and 70+ % do not last more than 3 to 5 years. Who cares about crossing an ocean as just leaving the dock and going out in the sound can be a BiG pucker factor
Also make sure you understand/know the basic of what boats look like under the water line as above the water line. Also what you think you might want to do with it besides being a live aboard. When you narrow you search, let us know.
Oh, while looking at marinas and boats also look for financing and insurance as they can be a great reference. Many deal fall through because of financing and/or insurance. If you do not have the boating experience they may not let you buy and/or operate it. Most meg a yacht owners have to have a captain/crew and/or at least some training.