Hi, I've never ridden a motorcycle, but I've ridden a bicycle. I want to be a professional superbike racer. What bike should I buy?
Seriously, CNC machining is a very cut-throat and competitive market. You will not turn a profit machining until you have at least a few years experience in it, and even then, many don't. If you're doing this as part of a business plan, job the parts out and forget about making them at all. Guys with decades of experience and hundreds of thousands if not millions in equipment will easily beat your best price on those parts.
On the other hand, if your actual goal is to learn machining and start a shop, then go ahead, but first make sure you have enough in the bank or coming in from other sources that you don't have to turn a profit for at least three years.