Hi Jroussel, I'm in Montreal (well, Longueuil in fact) and have made an extensive research last October to find a place to rent some time on a longarm. Mine broke, I had 10 commissioned quilts in line to finish, I had to find a solution. I couldn't have the quilts done by anyone else than me (the design was a very specific hand draw by me). I was willing to drive up to 5 hours to find a rental somewhere in the USA or Canada!!! I end up going in Ottawa, to a small quilt shop call Quilt and coton. They rent me a small HQ because I had the same machine, so they didn't asked me to take a lesson, etc. It kept my head over the flood while waiting for my machine to get repaired.
So, you won't find such place in Montréal (believe me, I did such an extensive search that I would have found it if such a place existed). But if you want to try my HandiQuilter to see if you like it, you are welcome in my studio. I don't have any quilting friend, so I would enjoy a visit :-) PM me if you want.