What do you think of Printrbot? The $600 unit prints 6x6x6 at 100 microns. It uses PLA, and an Adafruit adapter allows it to use ninjaflex. The $1000 unit prints PLA or ABS (I don’t know if it has an adapter for ninjaflex).
Resin printer like a DLP or stereolithography system, preferably the later.