Thank you! It really opened my eyes on Litium and Tera Factory building!
Yes the mining guy owns shares in a Lithium mine, and was talking his book to some extent...
However, his main point was it takes 5 years to ramp a new Lithium mine, so Tesla can't scale to 2 TWh in 3 years.
Car makers are squeezing margins in the current battery supply chain with the current over supply of Lithium prices are low and new mine investments are going slow.
So if someone "beep beep" finds a way of scaling battery production quickly, the supply of raw materials might become the rate limiting step.
Sure Lithium isn't the only material needed, it might even be the bottleneck, lots of Carbon and Nickel are also needed.
I think the point of Thacker Pass was this is a Lithium reserve that will be expensive to mine and process. I have a hunch he was talking about processing, specifically removing some impurities. So Thacker Pass is a Mine Tesla might be able to buy at a good price, because some science, engineering, R&D and investment is needed, but it has large reserves.
I think he also implied that if Tesla can find a way of living with some of the impurities in battery formulations, that might lower the cost of processing. If he isn't talking about impurities, he might be talking about the specific lithium chemistry.
I think Tesla is scaling to 2TWh in a time-frame more like 7-10 years, .but they are now investigating supply volumes, that is why Elon talked about mining..Lithium and or Nickel are the most likely candidates, but it could be any raw material