Quote: And then there’s the cost if your daughter, say, happens to be looking at an American school for post-grad studies..........................

And herein lies the problem.   Why is your daughter looking at an American school for post-grad studies?    If she is good enough to get into Harvard, there are world-class Canadian departments who would admit her for much lower cost.  If she is looking at an average US post-grad program, then the average Canadian institution would have a higher academic ranking, in my opinion as a retired academic.