To have base list of categories is good. I think music prod could be added, which could include the production off f a click track or idea or whistled melody, add lyrics into a full fledged song. Or just the clean up of existing tracks, similar to vid prod.

On the issue of categories, your taxonomy would be best if left organically growing. God knows, new jobs that don't exist yet may emerge.

Love the idea.
Also think it may be worth looking into creating a coop-cash based med insurance service... as medical services paid in cash are approx. 10x or more cheaper than insurance covered care. Just thinking out loud.

ch @globocop