Adrian Oorloff, 48, last year paid an undercover policeman to carry out the kidnapping of Richard Macko, a former friend with whom he'd twice shared Christmas dinner.

Oorloff told the policeman he planned to dispose of Mr Macko's body at a cremation unit which he once had at his property so that his victim and evidence of his DNA would "disappear without a trace", the County Court heard on Wednesday.

Oorloff's then-fiancee had complained to him about Mr Macko, who was also a patient at his Keysborough chiropractic clinic.

Judge Michael Bourke said while the grievances of Oorloff's then-fiancee against Mr Macko had not been proven, "it seems that what you planned and did to Richard Macko and his family was driven by this relationship, (and her) grievances and thereby your apparent need to act in quite an extravagantly criminal and sinister way against them".

Oorloff instructed the policeman to immobilise Mr Macko by injecting him with the drug "liquid G".

The chiropractor had been tracking Mr Macko and his siblings' movements on his mobile phone, and was familiar with their daily routines.

Police later found an electronic tracking device and a third syringe at Oorloff's home, as well as a round of ammunition, vials of poisons and four Viagra tablets at his clinic.

Oorloff later paid the undercover policeman a $5000 down-payment for what was to be a $20,000 job.

Judge Bourke sentenced Oorloff on Wednesday to six years and three months' imprisonment with a non-parole period of four years and three months.

While there was evidence that the cremation device existed, the judge said that he was only sentencing Oorloff for inciting to kidnap Mr Macko, without any speculation that he planned to kill him.

He was not sentencing him for conspiracy to murder or incitement to kill, he said.

Judge Bourke said that while the plan would not ultimately have "come off", it showed "marked sophistication" and involved a "high level of psychological impact" to Mr Macko and his siblings.

The family was forced to move out of their home for six weeks, with police giving them 15 minutes to pack their bags last July.

They had to move 14 more times in that period and were later separated when police decided it was too dangerous for Mr Macko to live with his siblings.

After he sentenced Oorloff, Judge Bourke spoke directly to the three siblings, who were sitting in court: "I don't think any sentence ... could address what you went through particular during that period of time."

Judge Bourke said he took into account the fact that Oorloff would suffer more in prison as he would lose his profession, and that he had previously pleaded guilty to inciting the policeman to kidnap Mr Macko, possessing vials of various drugs without a licence, possessing ammunition without a permit and possessing viagra without a prescription.