Inkscape has CAD-style dimension arrows though it would seem to me if you took any drafting classes it would be easier to do such manually. http://tavmjong.free.fr/INKSCAPE/MANUAL/html/Extensions-VisualizePath.html#Extensions-Dimensions
The projects I do around the house I can do a height, width, and depth view multiple times faster manually, than doing the same on a computer. Same with the wife when she does embroidery and thinks thing through, instead of using Viking 5D software.
Computers have their place but some shit you can just do better and faster with your brain.