The notorious sex offender who led a cult on the New South Wales south coast is selling the sect’s “holy grounds” after running out of money.

William “Little Pebble” Kamm had claimed the Virgin Mary visited the “sacred” property and told him to repopulate the earth with two 15-year-old girls.

Kamm, who now calls himself William Costellia, founded the Order of Saint Charbel near Nowra in the 1980s and preached a doomsday Christian message.

His followers handed over wives and daughters to help him rebuild humanity after the apocalypse and he has reportedly fathered more than 20 children.

He spent nine years in jail for having sex with two teenage girls before being paroled in November 2014.

Kamm founded the Order of Saint Charbel near Nowra in the 1980s. Photo: AAP

On his website, which he actively updates with reams of legal documents and preachings, he announced he would “let the Holy Sacred Grounds go” after it hosted “thousands of miracles, cures and conversions”.

“I had to purchase the land to save and protect it, but now we are unable to continue with paying the mortgage, which was very high, due to the lack of support,” he wrote on April 19.

He previously said his followers had chipped in to help make repayments after he was imprisoned in 2002, but that financial aid has since dried up.

“I wish to thank all our dear faithful followers who have been such a strong support over so many years, helping me maintain the mortgage payments and those who have worked so hard looking after the Holy Grounds,” he said.

“It is God’s property first and foremost – even if we should lose it.”

The 2.44-hectare bush property, located 10 kilometres from Nowra, is dotted with religious structures including shrines, a holy water spring, Stations of the Cross, a large work shed and a burned-out house.

“It has a shrine chapel adjacent to a creek with beautiful landscape,” his blog post said.

He blamed “the authorities and media”, along with his extended detention orders, for forcing him to sell the property.

Kamm wants $800,000 for the property, which has received interest.

His Sydney-based lawyer Omar Juweinat told The New Daily “the prospective sale of the property has already attracted a great deal of interest from not only local investors but also inter-state.

“He suspects that it will be a quick sale.”

It was valued at $380,000 in 1998 and $141,000 in 1996, property data shows.

Mr Juweinat said the sale was the “sad reality of long-term litigation”.

“Unfortunately, given the frequency and complexity of Mr Kamm’s matters currently before the court, it has meant that he has been compelled to dispose of an asset.”

Kamm is suing the NSW government in the Supreme Court so he can return to Facebook and Twitter, he said on his website in March.

-With AAP