My MPP: I now have a credit. I never intended to get a credit. But it have now.
Because it is effectivly 1,5% interest per year for the sum, for ten years.
So if I put it in index funds, at 4% withdrawel rate, I make 1,5% profit after taxes. Not to mention if I don't sell and let compound interest work on that 4%, too.
It is not only more expensive to sell investments than to get a credit, it is actually more expensive to not have a credit at all!