Software at level of Vectric Aspire or Delcam Artcam isn`t cheap but its`s aimed at a market where time is very much money and everything integrated into one process means being able to keep up with the orders.

At the level of market where probably spending some time trying to generate the orders, some lower cost options.

Free engraving software, Fengrave now got to V1.0, handles V-Carving and plays well with Cambam

F-Engrave

CamBam which is strictly 2/2.5D but will import a BMP to do relief carving, but only in one directional passes:

CamBam CNC Software

BMP2CNC is a similar relief generator

MR-Soft Nc Software Tools - Bmp2Cnc

Meshcam is similar to Vectric`s Cut3D , has a fully functional trial available, it does a very much nicer job than Cambam on imported bitmaps.

MeshCAM - CNC Software - CAD/CAM Software

Its worth trying them all out to see what you feel most comfortable working with.

Cheers
Adam