Two Mac Pros from Apple, 1TB drives, best GPU. Least RAM, weakest CPU: $9,598.00
Two OWC upgrades for 128GB RAM and fastest CPU: $10,473.98
4U rack with extra Mac Pro slot: $800.00
Total for a friggin' sweet Minecraft or Facebook machine: $20,871.98
The heck with Minecraft, you are going to need to mine some bit coins to pay for that thing!