If you want to learn SketchUp in ONE WEEK then this is for you and if you want to master this do it again and again. SketchUp is very easy, just make it as a game. My intention of this is not to make the audience boring but a small and a step by step approach . Since this is a guide and if you want to learn just make this example again and again then watch the Part 4 of this later up until you finish a 3D House