Many thanks to all who responded. I've been reading and thinking all day about what you've said - and copied what you've written into a permanent directory so that I can expand my perspectives by review.
It may very well be that I was mis-directing my efforts by trying to contribute to the recovery of terminally-ill patients. I jokingly call my CNC "Sancho Panza" - but in real life I try to avoid head-to-head confrontations with windmills. :)
I think I should have made clear that I wasn't (actively) looking for ways to expand /my/ enterprise (I do that, but that's not what this is about). Rather, I hoped to improve the prospects for those who might benefit from diversification into "green energy", and to keep /their/ employees on /their/ payroll.
Y'all have given me a lot to think about, and I'm grateful.