Hi,
Not much but may help in your search..
1949 he was living at 92 Botany Street, Waterloo (Cook district)
1954 he was living at 207 Botany Street with Mervyn James CASHMAN (might be a brother or something)

Raymond is listed as labourer and Mervyn as a driver.

Also in 1954 at 5 Keliek St Waterloo (Cook) is Albert William and Theresa CASHMAN...

In 1949 Mervyn James CASHMAN lived at 7 East Street, Ipswich QLD.

Kellie