People grow sunflowers for oil and you can grow hemp seed oil in the health food shop. Is growing hemp allowed in the home garden in Australia? Would be an easy crop (and an annual privacy screen) and you could press your own oil. Is it allowed and can I buy the seeds legally?
Medicinal herbs, kitchen herbs, perennial edibles and berries: https://mountainherbs.net/ grown in the Blue Mountains, Australia
Some red tape, required annual visits from snooping authorities, and a considerable expense. This is why I'm not doing it...not sustainable from a business perspective on a smallholding.
You ought to ventilate your mind and let the cobwebs out of it. Use this cup to catch the tiny ads: