I followed the Nemaska story. The mistake they made was that they took a miner's approach and tried to make it too large-scale too quickly. With many of these operations, you're best to start out at a more modest scale and make sure your process flow sheet works. You start with a small, modest amount of product to the market and then scale it up after time.
If you build it too big and your plant doesn't work right from day one, then you're going bankrupt.