Stack Exchange network consists of 178 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
What would be a good tag to use for doing business/making profit with a 3D printer?
I'd suggest two different tags:
[monetization]: For selling, or profiting from printing, or from printing machines
[financing] (or [costs]): For calculating the cost of materials and machines, including operational expenses.
I would propose something as [business] or [commercial-use] as opposed to [personal-use] to differentiate between these posibilites.