There are already a couple of other game stores in town you might check out: Games and Things up on Meridian has got an excellent board game selection but a more exclusive crowd using their play space, which is mostly dedicated toward Battletech and Flames of War.
Also The Comics Place sells game stuff and comics (naturally) and have opened up a satelite store over in Fairhaven and are also opening (or have already opened) table space upstairs from the store including food and beer service from the Shoe.
Are they sustainable? Remains to be seen. Games and Things has been around a while, but is a weird kind of store.
Also there has been a fair bit of grumbling on the Bellingham subreddit about Dark Tower from the MTG crowd, or at least a few agitators. I don't really know enough about that scene to weigh in on the legitimacy of their concerns, but it's out there.