One thing Ive noticed is that CAD packages can tend to be expensive. Talking from the point of view that I am so good at CAD the guys at work have taken it off my machine and left me with a viewer, there are some cheaper systems on the market.

One that stood out when we were evaluating these was Turbocad. It does a lot of the more expensive versions do but retails at $130 (about £70). We didnt go for it at work because it meant we had a bit of file conversion to do when we received drawings.

http://www.turbocad.comwww.turbocad.com

Andy