Cost of living in Caguas (Puerto Rico) is 16% cheaper than in Adelaide (Australia)
This comparison has some inconsistent or sparse data. It already provides a reliable comparison but it is not bullet-proof. It is based on 817 prices entered by 110 different people.
For example, to keep the same standard of living that would require AU$7,300 in Adelaide you would need to make just about AU$6,103 ($4,608) in Caguas.