Thank you for your thoughtful questions. I will try and answer them one by one.
1. I am using 46 weeks as my own estimate, assuming that someone who is paid hourly and without benefits might have to, for personal reasons , take 30 days off during the year.
2. I am ignoring purposely ignoring tax credits, due to their variability, but your point is  well taken.
3. I am using the poverty line developed by Poverty Free Ontario. It is a based on a 2011 figure which I have increased using actual StatsCan CPI for Ontario  and assuming 1.6% inflation from now to 2022.