Since it seems to be a pain to get a large amount of aluminum in late game, I have proposed that a building that solely focuses on producing aluminum, and will consume steel, microchips, and gold to produceUnholyAmounts of aluminum!!!
Employs 150 people,
3 x 4 (12 squares)
Consumes 1 microchip, 5 gold, 10 steel
produces 15 aluminum per tick.