I started with this cabbing machine: https://www.amazon.com/Hi-Tech-Diamond-All-U-Need-Polishing-Accessory/dp/B01N9URS8O/ref=sr_1_3?dchild=1&keywords=cabochon+machine&qid=1601047290&sr=8-3 for $460
And this trim saw: https://kingsleynorth.com/lortone-basic-trim-saw.html for $150. I bought just the base model since I had a motor laying around and felt handy enough to mount it all to a board and fit it with a blade myself.