Michael,
I have a local Farmer who said I can come over to his place (call first) and pick up any variety of manure I want. ((FREE)) That's a plus as he has very many kinds! Sheep, cow, horse, chickens... etc. Of course it comes with a small amount of debris like straw, wood chips and the like. But he keeps them sorted in different bins outside his barn. Would Donkey or Llama poo do good too?
I'm gonna get the chicken poo for now.
I'll see if I can pick up some commercial potting mix from a local nursery.
I never have a problem of recycling the plastic bags that soil comes in .... most times I jab holes in the bottom and grow in them till they start falling apart.

Thanks,
~* Robin