Old Biscuit - depending on provincial policy many have to be present in a province for 5 to 7 months to retain their health care benefits. Critical as many may be about it, this is still a biggie to the majority. That coupled with most favourable taxation rates and consideration of temperatures when in residence typically sways decisions.
For example we personally will retain Alberta as our province because of our health care, family ties, preferable for us taxation rates, corporate registrations etc. Albeit, shoulder seasons if present in Canada, would need to be spent in more temperate areas of BC.
Personally whenever we cross over into BC and even the maritimes, we find the non real estate cost of living with the additional PST/HST taxes, higher gasoline base prices at the pumps, auto insurances and other items push our budget to the max. I have journaled our expenses on all our trips of up to around 8 weeks at a time being present, for over decade and half to reference to this.