A good portion of the cost of Aspire is for the modeling tools. These tools are specifically designed for creating 3D reliefs. Aspire is actually cheaper than other packages with similar tools (CarveCO, Enroute, ...)
If you just want to carve models created by others (Which is what most people do), you don't need Aspire. You can import 3D models into V Carve Pro and carve them.
And there are other cheaper CAM programs than can carve 3D models. MeshCAM, CamBam, DeskProto, and others.
If you want to create your own models, there are many inexpensive or even free 3D modeling programs.
If you just want to carve models created by others (Which is what most people do), you don't need Aspire. You can import 3D models into V Carve Pro and carve them.
And there are other cheaper CAM programs than can carve 3D models. MeshCAM, CamBam, DeskProto, and others.
If you want to create your own models, there are many inexpensive or even free 3D modeling programs.