In respect to the latter, a recent update from Lake Resources NL (ASX: LKE) has shown that it now expects its costs to be significantly higher for its operation in Argentina.

As things stand, we still don’t know how profitable (or not) Argosy’s Rincon project will be and are awaiting its feasibility study. The company recently commented:
There is a complex, multidisciplinary process underway to complete a feasibility study to support any development proposal. There is a risk that the feasibility study and associated technical works will not achieve the results expected. There is also a risk that, even if a positive feasibility study is produced, the project may not be successfully developed for commercial or financial reasons.
** I have emailed the company to clarify, as they may want to respond to that article **