Isn't a villager enough for a very small farm? He only needs visual contact with the zombie. Then why do I only see videos so min. 3 Villager to be used?
I think no, because with the new update only golems spawn if it is a "village" and this effect can be achieved with several villagers.
L.G. ADMIRALS DOVE
Eisenolem spawn from 10 villagers and 21 doors in the village