I've been thinking about how I officially don't reside in the place in which I inhabit most of the time and how this might relate to future studies.
If it turns out that I do start a Ph.D. shortly after finishing a master's degree, if I were to stay in Calgary during any intermediate time, then I think that I'd be required to become Albertan. Then just a few months later I would have to officially move to yet another province as, since I would lack an Alberta permanent address, I don't think that I could maintain Alberta residency.
I've also heard that it is possible to maintain BC residency by visiting the province at least once per month. Perhaps this would be a viable option if only for a few months, since I'm not that far from the B.C. border.