I would say definitely stick with indesign for any text-heavy documents. Layout isnt designed for paragraph text.
Layout could replace illustrator, as you can tweak line weights etc using styles, add accurate dimensions and colours (but this would require the 3d model to be setup in sketchup first e.g. applying Tags in a certain way).
Illustrator, on the other hand, will be better for “tweaking” the model edges and faces (and allow you to edit them) in a more visual WYSIWYG manner.
Using Layout will have some major advantages if your sketchup model is updated, & changed often.
You may want to consider a SKP to LO to AI to INDD workflow to gain the best of both worlds…sounds complicated but each step is simple.
Can you post some examples of what you are producing?