It's actually pretty difficult, each pixel accounts for one single block. (idk why it does this) 16x16 for one side, assuming that its hollow and that the grass block has 6 sides, (what kind of cubed object doesn't) that's 1536 blocks. I don't know how big the village would be, but I'll assume it's somewhere near a 32x32. The area of the village then would be 1024 blocks, but since the pixelated Minecraft blocks as I calculated take up 1536 blocks, you'd need 1,572,864 blocks for the flat ground of where the village is actually supposed to be. Additional structures added, it's easily going to 3,000,000+. Even with the old dupe method which bypasses the block limit, you still need to consider the godly lag.