You really don't need round wheels, do you? check out rad's "known problems" in the brand forum. Plus numerous other complaints about spokes under introductions and parts forum complaint about cracked rim that didn't make that list.
Putting cargo on the rear of a conventional bike lifts the front wheel and makes it tend to skid sideways. Ask me how I know. If you have the money, get stretch frame IMHO. It puts your weight on the front wheel. Or put weight in a basket on the front, which on anything but yuba & radwagon you have to steer with your hands.
I haven't had a stability problem in 3 1/3 years and 6500 miles on this yuba bodaboda. I dumped of on my chin 6 times on cruisers & mtb's. I load the bodaboda up to 350 lb with groceries or ag supplies + complete tool set (less cranks & electricity) as I go off the cell phone grid. The only quality problem, I broke the front fender with my foot. I hated the OEM seat, but then I'm not female.
Surly big easy is steel frame, really heavy. Really sturdy. Somewhere in the middle are kona ute (the original), xtracycle, blix packa, yubabike, magnum, m2s, pedego (expensive) reiss & mueller (expensive). Ride the glide
https://www.ridetheglide.ca/products/electric-bikes/city-e-bikes/cargoroo-cargo-e-bike/ is canadian, has 26" front 20" rear. Very heavy. 20" wheel bikes which don't do potholes well are tern hsd & gsd, euronau. All above have tires & tubes you can buy somewhere besides the bike manufacturer (radwagon). Check known problems on each, magnum for example is not zero. Neither was surface. Butchers&bakers has a 20" front wheel and comes with a huge front basket.
If you can assemble a power wheel & hang a battery, envoy mongoose is under $1000. Dual leg stand is very important for loading cargo or children, but you can buy them aftermarket. The stand I bought came with my yuba, but accessory dual leg stands mount the same way. Don't know which ones have canada support. Important for carrying children is sheilding the wheel from pinch between spokes & frame. My yuba came with a plastic guard. Yubas racks are designed to fit certain child car seats, see the facebook page. I bought yuba mainly because I'm short and the drop frame model was special for that. Also at age 70 I can't lift a leg over the seat anymore.
With a cheap bolt on power wheel, you just throw things away until it works. I trashed 2 batteries (with one refund from amazon) before I paid luna's price for one that worked. In canada you have grin tech which is reputable for hub motor kits & batteries. No customs problems with them as I could have.
2" tires are fine for most trails or gravel, but wouldn't be much good rock climbing as the mountain bikers do. You wouldn't carry cargo or a kid there anyway. 2" tire is not for ice or powder snow. Fat tires don't come on cargo bikes, but you can get spiked ones for ice. Here in indiana if there is ice on the ground I ride the bus instead of the bike. Happened 3 days last winter, I just stayed home.
Geared hub motors are fine on hills shorter than 1000' rise in an hour or 90 minutes. Extreme rises like that overheat them, so with that profile you would be stuck with a mid drive that eats chains, probably drags when the battery runs down, costs a bunch. Radwagon magnum & blix are geared hub motors, the others I'm not so sure. Check the court reviews. PAS is jerky, not as cool as torque sensing, I mostly use a throttle for assistance when required myself. (I ride unpowered 80% of the time). When I wore out a $221 geared hub power wheel @ 4500 miles, I threw it away and had another installed in 2 afternoons. No begging to a bike shop for warrenty service or waiting for the 800 number to call you back. I had the new mac12 power wheel in the garage just waiting for the day when the plastic gear wore out. I was able to pedal home with no drag with the worn out hubmotor, try that trick on a mid-drive.
Happy shopping & later riding.
