I had a cat activity centre when my kittens were young eight years ago. Once they grew up I converted the 'pillar' parts of it to two really tall scratching posts. They are each about 1 metre tall. I have one on the landing and one in the kitchen and all my cats love them. If it were me, I would get many scratching posts, dot them about the house and see which ones get used. Scatching posts are a cheap alternative to damaged wall coverings and furniture.