My 2 cents not worth much importance, but here in the States breeding pure breed is more saleable than barnyard mixes ~ the feed stores here are usually sell better-known egg layers. However Canada climate probably does best having small comb breeds to not deal w/large comb frostbite issues ~ for instance small combs: Chanteclair, Easter Egger, Dominique, Buckeye, Wyandotte, Hedemora, Brahma &/or Cochin (except feathered leg breeds may be a problem holding moisture which freeze the legs in snow.)
If I lived in snow climate I would stay away from large comb breeds unless they were kept in warm temperature barns/housing.
But you know what? Take all advice w/ a grain of salt, evaluate your environment & housing conditions, & go from there. Decide if selling chicken eggs or meat birds is more in demand to customers & are eggs legal to sell in your province/zone, & who are your customers going to be ~ farmers market, neighbors, co-workers, etc.