Chickens are VERY good in winter. I know, i'm from canada too. All you need to keep them warm in winter is a one or two REGULAR light bulb(s), and some hay. On warmer days you can open vents windows etc. You should NOT get a heat lamp. It might get them too used to the warmth, and should it...
I just want to say that CONGRATS! I'm new to this whole BYC thing too.I apologize for you not being able to get Roosters. I do not have any, i hear their a bit of a pain. I think that your coop will be great it sounds really spectaculuar.
Thank you for sharing this, it is a truly perfect rxample that animals don't have to be cats,hamsters, dogs,to have such a wonderful bonding experience, that can be chickens. Thank you.