and envisiontec have a variety of machines: https://envisiontec.com/3d-printing-...ional/jewelry/

There are several small scale direct metal sintering machines around. Just do a web search.
http://www.cooksongold-emanufacturing.com/

Check that out.
http://www.cooksongold-emanufacturin...cious-m080.php

These are not cheap - but saves a lot of time.
And the reason they are so large in comparison to the build volume is because they are self contained. have a special atmosphere and contain all the powder, gas and laser equipment in the same box.