@tehn random question but if this $0.90 is something that is used in other machines could you imagine getting them sourced from a recycler would work for the type of small run you are doing? asking mainly cause I have always fantasized about the concept of a decentralized parts recycling coop/federation but never really thought it through enough.
@liaizon @tehn Somewhat related, @plgDavid made this excellent video about parts recycling: https://hackaday.com/2020/01/15/what-to-know-when-buying-chips-that-havent-been-made-for-three-decades/
It's not about generic components as much as it's about specific chips, but might be interesting to you as well.
@liaizon @neauoire @tehn @plgDavid it's super fun! we didn't notice any significant fumes; solder liquifies but does not vaporize, and properly produced pcbs have very little residual flux. The biggest fume hazard would be if the plastic connectors started burning, but they're rated to withstand the temps of soldering in the first place. If you are worried about flux/other residue, you could just wash the board with dish soap first.
the personal instance of Liaizon Wakest