The 2016 DFS estimated capex for SDV is US$376 million. [1] Last year Mt Cattlin earned EBITDA A$60.3 million. [2] So, if Mt Cattlin's profit were to grow by 17% per annum, we could fund SDV out of Mt Cattlin's earnings. It's a big "if" of course.
1. http://www.galaxyresources.com.au/announcements-1/sal-de-vida-revised-dfs-confirms-robust-operation
2. http://www.galaxylithium.com/announcements-1/annual-report-2017