Jim,
Quebec would have to take its portion of the sovereign debt plus provincial debt (you're wrong about that), all federal agencies would leave Quebec, the military would leave Quebec, Quebec would need to create it's own currency which takes years, Quebec would have have a poor trade relationship with Canada and would have to pursue trade agreements with parties around the world including the US, Quebec could lose land to first nations claims esp. if they choose to remain in Canada, anglophones would up and leave Quebec with their money, Canadian corporations would leave, other international businesses, fearing economic uncertainty, would leave, federal transfers would end, Quebec would get no share of the oilsands (that's crazy Jim), Quebec would be lucky to keep the assets they have in Quebec let alone any others. It would not be an amicable settlement and Quebec's economy would stagnate then crumble. Best chance, rejoin Canada or join US.