He told prosecutor Chris Macklin he'd constructed a place to store ammunition under the house because he'd lost his firearms licence.
He said during the attack it had spilled over into the bedroom where his girlfriend had fled, locking herself into the en suite.
"The fun and games started, the bed was flipped over so the en suite door could be ripped off its fitting, by then my girlfriend had gapped it," he said.
He described general chaos, people running around and recalled telling the group not to bother chasing her because she'd probably run to the neighbours, he hoped this would prompt his attackers to panic and leave.
Although still dazed and concussed, after being struck in the head with the butt of a rifle, he recalled being forced to his car then hustled back inside to find the key.
"There was a lot of pressure, urgency to find that key, until then I hadn't realised I was to be in it [the car]. I only remember bits and pieces, it was like a bad dream, I was scared, confused."
Once in the car it was driven to his central North Island property, a convoy of other vehicles, including his truck, following.
He told of demands made at gunpoint to hand over his other properties, including a luxury apartment. He said those involved became a "little bit pissed off" when he explained they were tied up in trusts and companies and couldn't easily be transferred.
Questioned about the men who were with him, he branded them as "not to be messed with types of characters, formidable."
He said he attempted to smooth things over with them in the hope he'd be returned to Rotorua because of his grave concerns for his girlfriend's and the maintenance worker's safety.
Intervening, Justice Timothy Brewer asked: "Were you saying 'take me home and I will pay you a lot of money and not go to the police?"
Witness: "More or less . . . I wanted to get them out of my life."
He said after several hours at his farm he was taken for a hot swim then to a bank.
Quizzed why he hadn't tried to escape or yell for help, he said he wanted to gain some trust.
"My strategy was to get the hell out of there as soon as possible, smooth things over without involving the police."
The court earlier heard he had fled to Melbourne for a short time after hearing a group of men were looking for him after a woman, who the Crown says was a girlfriend of one of the gang members, was injured when a sex toy broke during a liaison aboard a boat with the businessman. The trial is continuing.
