Very well done! It really shows how Sweet Home 3D can be helpful in the planning and preparation stage. And of course to show the landlord what you want to do. A plan created with Sweet Home 3D goes a long way!

I really like the Sweet Home 3D design and renderings compared to the real life results. A great presentation, thank you!

At the heart of the Mix Stage there’s a very functional workstation called Nuage. I needed to make a model of it, which took a while.
Apart from the rounded sides, this model, like most other models and work prints were all created with SH3D.

I tend to use Blender for anything rounded although in most cases the base is created with Sweet Home 3D. You could have created the rounded part in Sweet Home 3D too: use a wall for the rounding as if the part is standing on its side. Export, import, tilt and you have your rounding. That is what I would have done but I would have edited the exported part in Blender anyway: to remove all invisible and unnecessary faces (reduce size) and to smooth the rounded surface.