I had a mind so. I agree, I don't have enough money to start such a time-consuming business all by myself. It could work though, but most likely it wouldn't make as much money as I'd like it to.
i dont think you'd make any money at all (100% sure you would lose money)
there's no way you can possibly make it affordable, or attractive to consumers vs larger companies. they buy their materials in bulk, you wouldn't be able to. their production processes would be waaaayy more efficient too. you wouldn't even be able to recoup the money you spend on the printer.
as the guy before me said; more of a naive whim