I'm deaf (and I think everyone here realizes that from images that I've posted), and I would not want to go to a "singular" site about deaf people even if I am one. Just something to consider. You need to find the right deaf folk in Canada - elsewhere - whether it be facebook, twitter, google or youtube, whatever. And entice them. There are millions of deaf folks, but a lot of them don't speak out or openly about their situation.
As a marketer, I think the niche you're diving into is one of the toughest ones. Not only are you diving into a hard niche, you've got to work local.
Your best shot at success is working with schools, non-profits, governments that promote deaf folks and education of them. In fact, treat your site as an info site.