Cold Fusion,
Yes, don't spend a fortune on software to cut parts like those. Bobcad (or equivalent) would suffice, and is not free, but at least it has the basics of a cadcam system. It will help get you on the right footing to branch out into other fancier stuff later on, should you need to.
I've never tried the route that a lot of the guys are recommending with dxf file convertors, but you'd still need to edit in a lot of stuff to make a program (I guess). At least something like Bobcad has the toolup/tooldown, and various other gcode macros handy to insert.
First you get good, then you get fast. Then grouchiness sets in.
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)