Nifty idea, but I imagine that Chocobo Breeding in this game will be somewhat similar to FFXI, FFVII, etc... That is, it will be a past-time accessible to everyone, but not a class/job.

Some of your ideas could be wrapped into a new animal raising DoL class: "Tamer" (maybe a different name) -- Think BST, but raises/tames animals for harvesting items rather than combat