I'm not sure this is the right forum, so mods may move this topic...
I currently work in the pharma industry on the commercialization side (although not training, but I do interact with them regularly), so I know where you're coming from. Anyway, for such a small career shift, salary will depend completely on your previous salary history. Also, why Canada - is that where you're located currently? You probably know that the pharma industry is much larger in the US. And do you feel that your current company won't promote you into a trainer position from the field (that is one of the most common career paths for a rep)?
The MBA application process summed up in 20 seconds: http://www.youtube.com/watch?v=x-s2tLbqlOc