Trying to figure out how these work. Read up on the wiki about the location and I can see how it was done. However does this just limit to only one? I have a house in the same location that has one, and I would like to have my horse show up at my house as well and not just from the default position that's already there.

In other words, the current one is at the whiterun stables, and my house is just a little farther down before the western watchtower. It's in the same location as the whiterun stables, which is where the horse will spawn now when I fast travel. Is it possible to have the one at whiterun stables, while adding one to my house too?