why don't you suggest to your dad you do the project together? It is very cheap to do. We made a cat tree that went from ceiling to floor. It is comprised of a few shelves covered in carpet and a floor to ceiling length piece of wood we used 2 x 2 wrapped completely in sisel. We notched out a place in the shelves for the pole to fit and used long screws to stablize it to the shelves. And the shelves are merely attached to the wall with brackets. No nails. We used long staples and screws. You can see what we did here