I am based in Alberta. My wife and I requested a one year visitor's record and we were granted that at the airport.
We then went right to a DMV and I requested my wife have alberta health insurance. It was granted and she received her health card in the mail a week later. The whole process was scary easy. All the government wanted was mail with the current address that she resides in Alberta with and our marriage certificate. We signed a form saying she was intending to reside in the province for at least a year. This was before we even submitted our PR app! There is a catch, however. If we were audited and the government found out my wife had left Alberta and moved somewhere else - she would be charged for the medical services that she received here.
I'm not sure what Ontario is like but I would look into it and see?