Gigafactories are crucial to the future of Tesla, even more than awesome cars and SUVs like the Model X. The delicate mix of car production and battery manufacturing will help Tesla roll cars off the line like never before, and if history is any indication — they’ll sell them all. How much will a ‘Gigafactory’ cost, though? What does it take to build one? Building permits give us those details, and shows just how big Tesla is betting on themselves as well as our desire to have an all-electric car.