If you find all the hills you need to climb easy at present with a Torq, then you'll probably manage ok, but the Torq is one of the least ideal e-bikes due to the overgearing that Django mentions, despite it's power.
Exactly the same motor normally geared in the Quando is great for towing, and would suit almost any capability of rider.
Ultimately it depends on the gradients of the hills and your riding strength and fitness, so best to try it out if at all possible.
The rear frame is strong enough for towing attachments as Django has shown.
.