My niece has goats. Knowing what I know (which isn’t much) I don’t see them being very amenable to a collar/wireless fence setup.
Collars are fine if you want to manage them, be able to lead them for hoof trimming, shots, whatever. Ours were for showing at the local fair and state fair. Its leashes that are bad, tying goats out so they can eat. Their throats are very delicate and they are prone to choking. Plus they are so active and can get into trouble.