Super rich Asian couple buys Great Keppel Island for more than $50m,
promissed to spend another $600m to develop .
But The Australian Financial Review understands the Asian power couple has agreed to buy not only the resort site but also a much larger adjoining portion, with a golf course and villas on it, taking the combined landholding sold by Mr Agnew to almost 1000 hectares.
Aus government contributing $50m to provide Island with water and electricity . All starts next year if approved .