there is a free version of artcam 2017 - but it is 2d only, so you can try and learn, the full version is $360 per year USD.
that for a table top educational toy which I have, is too much, in my opinion. If I use the 2008 version and find it useful enough to upgrade to a larger mill, and am using this to make money, then it would be proper to also pay and get the full current version.

there is also several free programs that I will be trying out. well, for me it is all about the education at this point.

thanks to Eleksmaker