Interesting read on the production benefits of choosing Canada:
https://www.thelist.com/1025851/the-surprising-reason-hallmark-likes-to-...
The amount of holiday content Hallmark turns around is impressive!
Is there anything else that rival this market?
This is the reason a number of productions go to Canada - money - crew rates and tax breaks (same reason movies / TV shows are shot in different locations in US). If you use actors from the US or UK, you'll still get a tax break (though not a big if using all CA actors); Hallmark movies are really MOW (movies of the week), which have always shot in 15 - 18 days, same for US productions. Three takes, move on.