For anyone that wants to compare pricing, I just checked...
the Air Canada RAT is $79.00 for each two pack if you're an Aeroplan member. It's $129 if you're not. Seems worth it to join the program for that alone.
If you want to use points, to buy 2 2-packs (didn't price out one) is 28,200 points or $98 and 14100 points.
These need to be bought at home.
Now, if you want to use the Port Canaveral RAT testing after the cruise, it's $41.40 (USD) per test. I don't know about any other options, such as the MCO airport or other ports.
The kicker is if you'd planned a day or two in Orlando or you're driving home, you can't use the Inspire RAT to get you home. You'd need the Switch Health test, which you'd take with you from Canada, or you'd have to take the $98 PCR test at the port or find something along the way.
We have opted for the PCR test at the port after the cruise, as we are driving home (I think we're the only ones on our sailing!), but I've bought these as a back up. The reason? Because none of us want to get within a day of re-entering Canada only to find out we will be denied. I might change my mind about the PCR test, in which case, I can get my money back. The Canadian Switch Health test kits are final sale (but can also be saved for a late trip you might take.)