For your use, I'd suggest looking at TurboCAD. I used autocad for a couple of decades when I was gunmaking and smithing (started with 2d v2.11 acad
).
Made the switch a while back to TurboCAD and haven't touched my autocad since. I think you'll find everything you need in TurboCAD Deluxe v11 at a nice price that doesn't have you forking out for bells and whistles you will never use.
Tiger