Hello all! I want to try and make a vertical cat tree that looks like this (with a plain base rather than a mechanical one):


I am an absolute beginner, and I was wondering how to best make the metal components of this, including whether it may be easier to make it from PVC/other sort of piping and just give it a metallic finish to try and get a similar look. I already have round wooden boards that I can use for the non-frame components of the project.
Thanks in advance for any thoughts/advice 🙂
Edit: quick additional note - this would be a floor to ceiling cat tree, so would be braced between the two! It would not be free standing.