Nope. Anyone can do it. A Harbor Freight drill press is all that’s necessary.
My son’s built theirs. We used a milling machine simply because a friend has one. Great learning experience.
Others I know used simple drill presses.
Polymer stock is even easier than metal.
I’m interested in metal working and am looking to pick up a Bridgeport mill. Being able to fabricate something useful from a hunk of metal seems like magic.