All I will say is this.
If you smoke weed and want to get bopped every time you buy shit, then move to Chicago. I've got some family there, as well as step-family, and I've been told that for a gram of some good shit, you'll be paying probably around $30-40. It was from a very reliable source too.
If you move directly into Seattle, then duh it's expensive. But if you stayed somewhere a little farther out, like Shoreline, Lake Forest Park, Mountlake Terrace, or something like that, you wouldn't be paying as much.
Obviously you wouldn't move just for the weed situation...but the weather there is pretty brutal too. Seattle is fairly mild, warm to hot summers, and the winters aren't usually horrible. We get snow and shit, but usually not more than 6 inches. Although about 10 years ago we got like 2 feet in a couple days...lucky for me I was in Florida on vacation for x-mas. lol....
If you got any questions about Seattle, post a thread in the NW forum or hit me up. I can give you some info as well.