there are lots of liveaboards here in Seattle. Some of the small private marinas around lake Union and Salmon bay could be your best bet to find space. I've certainly considered it over the past few years, but staying land based for the moment. If you don't need to be around a city, per se, you can try Port Orchard, as mentioned or further afield like Kingston, Winslow, Port Townsend, Oak Harbor, or?????
S/V In Deep
“Navigare necesse est, vivere non est necesse” To Sail is vital, to live is not.