Level 20 chocobos - Make them a little different?

[Felis]

Aside the economy (basically their reason for not doing certain things.) Since our gardening is already packed as is just on onions having speed boosting will require something bigger since that gives you an advantage over those who don't partake in gardening/shelling out tons of money (while it seems like nothing to us, to SE giving advantages is a no-no.)

No problem
It could be something like Mimett Gourd seed + Thavnairian Onion seed = "make your chocobo faster" seed
This way you would get mimett gourds that increase the chocobo heal power, Thav Onions and the seeds for the increased speed in one go.