[user5994461]

>>> I realize we've become entitled to expecting people to work for free...

Do you realize that they made around $30k from youtube alone for this single video?

[ethbr0]

$30k income

$2k laminar flow gas nozzle (believe that was mentioned in the video)

~$1k misc parts? (including prototypes and testing)

So that's ~$27k for labor and shop depreciation (machinery and building)

So ~$25k left.

Let's say it took 4 people 1 week (40 hours) to build. 160 person-hours total.

$25,000 / 160 = $156 / hr

For feast-or-famine creative work, that doesn't seem unreasonable.