Factory-Style Iron Farm Java 1.21

I need a reliable iron farm that runs on Java Edition 1.21 or newer, sized generously for my multiplayer world. I will prepare a fresh, level plot for you; all design decisions from spawning platforms to villager pods can assume flat terrain with no surrounding builds to interfere.

Beyond raw efficiency, I want the entire exterior dressed up as a classic brick-and-steel factory—think tall smokestacks, service pipes, and loading-bay details—so the farm feels like an industrial centerpiece rather than a floating box. Interior redstone and spawning mechanics should remain accessible for future maintenance without breaking the aesthetic.

Deliverables
• Complete build in my world (or a compatible .litematic / WorldEdit schematic if remote work is easier)
• Block-by-block materials list so I can gather resources in survival
• Clear explanation of the villager + zombie setup and any chunk-loading or AFK requirements

Once the farm is up and running I’ll test throughput over several in-game days; as long as golems spawn consistently and items funnel cleanly to a single collection chest, the job is done. If that sounds straightforward, let’s talk timeline and any questions you have about access to the world.