The shop layout really didn't take very long. It's really just a matter of laying out the foundation "rectangle" the right size and use the "push/pull" feature to "raise the walls". If only it was that easy in real life! You can then erase or hide the roof and/or walls for better access to get around in there. The tools, workbenches, etc, I found on the Google server and just downloaded them into my model. Actually someone else had a fully outfitted shop, which I downloaded, hit "explode" and broke the tools and benches out of it to place in mine.
Mario, I was able to draw up my spring project - a full freestanding metal roof-over on my home - with great detail. I actually have an exploded view that shows the individual scissor trusses, Glu-Lam beams, etc. Really handy for visualizing how the project will go together. I especially wanted to see the finished project to make sure it wouldn't look out of place, as the new roof will sit ~18" above the old, to see how far out to take the eaves to make it blend in seamlessly, etc. I even went inside and drew in my fireplace inside and an outdoor BBQ while I was at it. Priorities, you know....

There's a little learning curve as with all programs of this type, but this one is much more powerful and much easier than the other ones I've tried - and I've got several on my computer.
Easiest way I've found to do the roof is to draw a vertical rectangle at the peak to the roof height. Then draw rectangles from that line down to the edges of the building, select materials and it is roofed with just a click. Then you can delete the extra temporary lines you don't need. I think I saw somebody already had a Unisaw built on the server. Just click the Google tab and select "Get Models" to search for it.