Can I offer an idea? I'm in a couple of print portfolios through the PSA (Photographic Society of America) and the way they work is like a circuit. There's a person in charge and an ultimate reviewer (which you could likely drop for this because that's mostly for something PSA does once a year). The person in charge sets the schedule and mails his print and a write-up to the next person. They add their print and write a short critique on the other(s). Then to the next, etc… The ones in PSA have 6-10 members in each, so you're just reviewing that many prints and you get that many on yours. Since the packet gets mailed by each person to the next, you just pay for that leg. Once you've completed more than one circuit, the next time you get the packet, you take your old one out and put in a new one. In most, you end up with 2 in it at any one time to make sure each gets reviewed.
I have no idea about Canadian mail prices, but the US ones are usually under $10 for the 8x10 one and about $12-$15 for the 11x14 one.