Thanks MC, that is really helpful.

I have enough on a learning curve regarding using the machine without having to build one first, so I am going to go with the fully sorted route. I have had a look for the triac based on your message and have found one on ebay for £3,500.00 with no tooling, but converted to mach3 (though needs a licence key)

I ideally want a mill, as some of the parts I'd like to make are a little more complex than 2d - and whilst I'm sure it could be done of a router, if I'm spending the money I may as well get the right tool for the job.