I don't know how much work is involved (especially if there is much post printing finishing work) but I imagine it is more time consuming than most consumers realize. I don't know what the guy behind "Shop Nation" actually produces, but I watched a couple of his youtube videos setting up his new workship with a few rows of 3d printers and streamlining the layout around keeping the printers feed and getting their output into shipping boxes.Had actually seen guy doing Razor Case, it was slow process.
It is his hobby business, could not make much off slow process.
Cases were nice, but wait was long.