Rental and other related income is the full amount of rent and associated payments that you receive, or become entitled to, when you rent out your property. (ato.gov.au)
If the property is priced low, putting it up for rent is a better option as you will obtain a fixed amount of rent periodically. (jeffadams.com)
In section 8 they don't just pay some certain amount of the rent, they say what the max rent THAT tenant can pay is. (biggerpockets.com)