In my area, generally the fees are 30/45/60min=30/40/50CDN. 60CDN/h is where it seems to max out for teachers with MM or even one who has a Phd and a very impressive CV. ..... however rents in Canada are much higher, and with the higher cost of living I am afraid that unless I can pull 4-6k/m consistently then I may pursue other options than trying to struggle with a studio that at the end of the day just isn't cutting it.
I can't address the teaching part, but good heavens - $4,000 - $6,000 a month?
Hate to say it, but as a piano teacher in Australia who is teaching full time - that's what I'm earning (approx. $6,000 USD) a month. That's what we call a full-time wage in Australia. I do work hard for it though... Perhaps you should come to Australia.
And I'm living on a bit more than 1/3 of that in Canada. Therefore I question that one "has" to earn that much to survive over here.
The opening post was about Canada specifically, because the OP moved to Canada. As I understand it, Green thinks that to make ends meet you must earn $4,000 - $6,000 per month, and for me even reaching the lower figure most months is an extraordinary and rare feat. I know that people live on less than that here. It is specifically about Canada (not Australia or elsewhere). My response was not about what a piano teacher might charge per hour here, which is another aspect, only this first one, because it surprised me.