100k? I guess everyone missed the nexdent denture webinar that imagine did. A nexdent printer is around $10k, a scanner can be had, new, for under $5-6k, exocad another $5k. Thats a helluva lot of dentures to make $20k, but youre wasting your time milling denture bases, it probably takes 3-4 hours to mill a denture, then teeth. The chart 3d systems had showed their resin to be stronger than acrylic. Not to mention you can print 5-6x at once, and in probably half the time (and cost) it takes to mill one. The ivoclar puck I bought was $50-60+ I think, not very profitable, not to mention at least 50% waste material.
I think you have the right idea, just keep researching. Just like anything else, you can dip a toe in without jumping in the pool with your clothes on.. Start with a scanner to digitize your models, outsource the rest. There is a market for digital dentures, just like there is for any other crappy denture. Its not an ivocap, but at the end of the day, its still plastic teeth.