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... (Budget: $30 - $250 USD, Jobs: 3D Modelling, 3D Rendering, Game Design, Java, Minecraft, Product Design)