Gold Farm V3
Materials
Getting Onto the Roof
1 or more ladders.
1 or more ender pearls.
10+ obsidian to create a portal on the roof.
1 flint and steel or other ignition source.
1 gold boots (optional).
The Farm
47 stacks and 46 magma blocks (47*64 + 46 = 3054).
28 stacks and 25 of either glass or leaves (28*64 + 25 = 1817).
2 stacks and 6 of your choice of building block (2*64 + 6 = 134).
7 stacks and 50 of your choice of building slab (7*64 + 50 = 498).
1 stacks and 54 ladders (1*64 + 54 = 118).
19 trapdoors.
4 nametags or another way to make 4 mobs persistant.
4 of either mud, honey, soul sand, or some other block that rails can be placed on top of and hoppers can collect items through.
2 rails.
48 minecarts or materials to craft them (3*64 + 48 = 240 iron ingots = 26 iron blocks and 6 iron ingots).
4 chests or more depending how much storage you want. I suggest a multiple of 4.
4 hoppers or more depending how much storage you have.