I don’t know if there are any lessons here for Tweed Shire Council, but I recall something similar to their Kingscliff beach problem at Lennox Head around 1967.
As far as I remember, the beach was being severely eroded and threatening properties. A group of landholders, led by Lismore businessman Bill Trezise, built a stockade wall along the beach with ti-trees. They used a big water-jet hose to dig the holes then dropped the tree trunks in. It was the talk of the municipality.
I don’t know if it would be possible to do it that way these days but I am pretty sure the strategy worked, and it wouldn’t have cost a million dollars. Perhaps someone with more local knowledge remembers a bit more, or has some photographs.
Hugh Kearney, Murwillumbah