Excellent suggestion on starting out small and moving up.
Would suggest one used 5 LPM concentrator with a GTT Cricket. Then add a second 5 LPM concentrator for a bit more heat. (BTU's). The Cricket will work well even into 1/2 inch boro beads.
A used medical 5 LPM machine can often be had for under $200 on Graig's List. If under 10,000 hours you are still at 1/2 of the usable lifetime. But less is better.
Then add a third concentrator and move up to the Scorpion which uses the Cricket as the center fire if that fits you future needs.
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