I came here to say this. It takes something like $1.5-2k to set up a machine shop. While for others it may be a small amount, for others it may be a large amount. So it depends, if you are a hobbyist out to learn and establish yourself in the machining world, this does not have to be hard. Of course, you can't expect to make a living out of it at a go - but if you are already in the business, it is much easier to adapt new means and tech and use it to your advantage!