BISA has many errors and I think George's arrival on the Sultana is not your man. George born 1842 who arrived on the Sultana with his father John, mother and 2 siblings died in 1886 and is not listed on the passenger index of unassisted immigrants at SA Records. The online transcribed records show John with two children named George and the comment [whose child]. The records are also available at the State Library of SA.
The 1929 death certificate in SA would detail -
Date and Place of Death
Length of Residence in Commonwealth
Age at Marriage
Number of Issue Living and Deceased
Cause of Death
Place of Death
You can purchase transcriptions from SA Genealogy and Graham Jaunay which are considerably cheaper that purchasing a certified certificate and the information is the same. Google for websites.
Hopefully his place of birth is noted. You could search for him on the 1851 census but there may be a number of George EVERETT's b. c1842 with father Edward.