>>55133
Depends on what you consider "affordable" and what kind of metal 3D printing you want, and what you consider "affordable".
SLS? DED? Binder Jet?
The latter is ironically the cheapest, and they use it to make nuclear fuel and aerospace parts.

SLS is what they use for the meme printed metal suppressors, and it's not... incredibly expensive. If you already own a machine shop.