I use AutoCad and SketchUp. As I said in my article, SketchUp is easy to learn and it’s free. AutoCad is a different story though. It’s quite expensive and it takes awhile to learn it. I learned AutoCad in college and used it for 6 years working in architecture so it’s second nature to me now but it’s not really a program that you can just jump into and learn quickly like SketchUp.
I usually use AutoCad to produce my dimensioned construction drawings along with my sheet good layouts and cutting diagrams. I use SketchUp for developing the design and producing the marketing and presentation renderings.
I have downloaded SketchUp and watched a few youtub videos. I am sure it would be very useful, but I can sere there will be a lot of hours practicing before I am any good with it. It’s amazing that the software is free.