Another idea some might want to check into. Of course this also is likely to be as an independent subcontractor with no taxes taken out, but that's part of WAH. The company I used to work for was a commercial printer who did a lot of kitting/contract assembly for customers. We had what I referred to as a "cottage industry" of WAH contract assembly people. Some were employees, or family members of employees, and a lot of retired people. You were responsible for meeting quality standards and pick up and return of materials. Our contract assembly people made anywhere from $80-$400 a week depending on the project and how adept/quick they are. I would call around to printing companies in your area and ask if they outsource any "hand bindery" work, Specifically: kit assembly, handfolding, stringing, collating, inserting etc.
Don't fall for any of those places that charge you for information, what you usually get is instructions on how to sell the same thing to other people, that is your pay for stuffing envelopes. You may have to keep calling back, as we only had occasional openings when we took on a new project, or one of the contractors, decided to quit. The people who got the new slot were ones who were persistent in checking back. On some projects, we had people who had been doing it for 15 years.