The only marriage for a Rhoda Theodosia Hochuli is as follows:
Groom: CROWLEY Given names: Francis Leo Valentine Bride: HOCHULI Given names: Rhoda Theodosia Date: 1911-07-12 Groom Age: 22 Status: S Groom's Father: Charles CROWLEY Bride Age: 19 Status: S Bride's Father: Samuel HOCHULI Place: Holy Trinity Church Adelaide District: Ade Symbol: Book/Page: 248/91
There are at least 2 children to this couple:
Surname: CROWLEY Given Names: Lorna Rhoda Lucy Date: 1912-08-09 Sex: F Father: Leo Francis Valentine CROWLEY Mother: Rhoda Theodosia HOCHULI Birth Place/Residence: Adelaide District Code: Ade Symbol: Book: 892 Page: 5 Cross Reference:
Surname: CROWLEY Given Names: Frederick Leo Date: 1913-12-25 Sex: M Father: Francis Leo Valentine CROWLEY Mother: Rhoda Theodosa HOCHULI Birth Place/Residence: Adelaide District Code: Ade Symbol: Book: 926 Page: 30 Cross Reference:
I cannot find any marriage in NSW for Rhoda Theodosia but as you say she died in 1927 as Davis and her fathers name is James on both marriage in SA and death in NSW.
No death in SA for a Francis Leo at least to 1915.