I think they misunderstood a Stats Canada paper to get a wildly unrealistic cost estimate. I linked it and some numbers in a reply further up.

I’m pretty sure they got their numbers wrong. I have linked to a Stats Canada article in a different reply with what I think are correct numbers that are massively higher than their claim.

I saw your cost claim and found it really hard to believe. I mean I spend more than $200 a month raising two cats lol. I found this from Stats Canada from 2017 https://www150.statcan.gc.ca/n1/pub/11f0019m/11f0019m2023007-eng.htm as far as I can see your numbers a way off. Looking at Table 2 for Predicted annual expenditures for one child in a one child family. It costs $14960 a year from 0-5 or $1246 a month which seems much more realistic. I wonder if you were assuming that total was from 0-5 rather than the total per year from 0-5. If you take the 0-17 total of $290,580 the monthly is $1424.

You don’t need to keep the Royal Family to stay in the Commonwealth. Take a look at the current members of the commonwealth.