Hi - we have a large Laser cutter /engraver which is used commercially for trophies etc. Both of us use Corel Draw - I stick to version X3 as our laser is now 7 years old and its software does not handle the new versions of dxf files (CAD) , Better half uses the latest version - but the cheaper student version as she simply saves files as version X3 (13) and passes on to me to produce CAD files for use with the Laser. Its only 2d unlike CAD software where you can get isometric views so when I set up 3d items such as boats you have to check it all out carefully. There are still some free versions of CAD software around but Corel is easier to use and you can export files in practically any software version - eg dxf, dwg, pdf, jpg etc.
Basic difference is CAD files in a circle produce hundreds of data points (uses minute straight lines ) whereas Corel uses 4 data points. Same applies for any type of curve. You can also zoom in to about 45000 times magnification on Corel to give minute corrections.
Either type of software it takes time to learn - make sure whatever you settle for provides tuition of some sort - not just a manual.