Again, I am not trying to discourage you from pursuing your project with RPI/HA and so on. But, in my assessment (assuming I understand your situation), I think the smart plugs are way better. To start, you should download the KASA App (on iOS or Android), and play a bit with it. It has basic automation (i.e. start/stop at given times) and more advanced features, like schedules/scenes, … etc. If such automation is not sufficient, then you can integrate in HA. In fact, I can control many plugs in my home from my phone, with both iOS HA and KASA.
Now, there are many smart-plugs available out there and many companies make them, including Amazon. I prefer TP-Link as they’ve been on the market for a while and are pretty reliable. Also, check your local Costco, they might have some made by Feit, and those tend to be much cheaper.
If you want to stay with TP-Link, there are many options. The latest model is KP115, which looks exactly the same as HS-105, but in addition has energy monitoring. With the KP115, you can tell how much power the specific device is consuming.
The amazon.ca website lists the HS103 smart-plug for CDN $12.99 … which is pretty good in my book. Make sure the plug’s rating (10 Amps) is sufficient for the pumps you’re running. Otherwise, the HS105 (15 Amps version) is what you need, but the price becomes very high ($44.95). I am not sure why prices are much higher in Canada ???
Now, if you want the KP115 (has energy monitoring), check BLT Sales, it’s a web store, and they sell them for US $22.00 each. Make sure they can ship to Canada and whatever customs/duties apply.