There are free SketchUp models that anyone can download if they love 3D modeling and don't want to go through the tedious process of having to create them from scratch. This is true even if SketchUp is generally easy to use. It can be difficult to create 3D models on SketchUp, especially if you are working on a large project, as drawing 3D models can take a lot of time.
There are a number of websites available on the internet that offer ready-to-use SketchUp models. Although some of these sites do offer free SketchUp models, there are others that do not.