I think I'm still leaning towards building Fernie a multi tier PVC "jungle gym". I'm thinking at least two tiers so she can choose and thermoregulate as desired. It'll be removable for easy access and cleaning too.
I think it's CALM who uses PVC and roughs it up with sandpaper. He then uses the spray paint that looks like stone to make it more naturalistic looking. I think I'm going to try that and then a few coats of clear coat. The paint itself dries kinda roughly textured so it would offer traction and grip support as well.
I love the way twine looks. But how is it to keep clean? That would be my only hesitation going that route. I'm a big fan of easy clean up, hahahhahaa.