If your part is small enough you can do small scale (several hundreds to low 1000s) of your units in house for a machine so cheap money wise to build that it’s

If your part is small enough you can do small scale (several hundreds to low 1000s) of your units in house for a machine so cheap money wise to build that it’s better than outsourcing even without the QC concerns. Also even prototyping sometimes gets old on the 3D printer when you have a 5 hour per you need to make 10-20 of that you could do in an hour with the molding machine. Though IMO faster prototyping is not a good reason for getting a molding machine, it’s just a nice bonus. There are plenty of shops in the USA you can send your STL file to and they will print a bunch of them for a reasonable price. The real reason that you want a molding machine is fast small scale production runs because oftentimes what you produce on a 3D printer is either not professional looking enough to sell (the lines look very hobbyist) or FDM cannot achieve your product requirements long term (outdoor plastic enclosures, for example, need waterproofing with FDM but not with molded parts)