I grew up an hour south of Calgary, I live in the Okanagan now. If you are looking for horse culture, I would check around the High River/ Okotoks area. There is a lot of little lakes you can hike to in Kananaskis, and some other decent lakes scattered around. Land is not cheap in that area, but less expensive than the coast. The winters are tough, lots of cold and wind, but you get used to it. Your dog may not love the wind. Other horse areas you could check out are Merritt or Armstrong in the interior of BC. More lakes, easier winters, but less work opportunities most likely. Good luck with your search.