Sketchup 3d model Unfamiliarity

Hey everyone, I’m having some trouble understanding and working with this 3d model:

I’m loading this sketchup model in blender as a Collada file (its available to download as Collada), but once I open it in blender, I can’t load the texture nor can I edit the model itself.

Moreover I’m confused on how this thing is even set up. Its like nothing I have ever seen before. The model parts and tagging are all over the place and the model itself is unusually slow, even for a model with such a high poly count.

I have tried my hand at making it easier to work with, but I have had no luck so far and there isn’t any tutorial I can find on fixing the confusing setup for this 3d model.