Here is a 25 x 25 x 24 Nether Bunker (schematic above ground to show full height, bury it until the door is flush with ground) that I threw together. Plenty of room for decorating to add your own touch to it, I did furnish a few basic necessities however. Floor B1 (1st floor down) is basically your living area, Floor B2 is your farm floor and Floor B3 is where your animals are kept, which I threw in a couple of cows, pigs, sheep, mooshrooms, and an automatic chicken egg gatherer. Feel free to use or modify how you see fit, just give credit where credit is due please. Thank you and enjoy.