Apart from the cost of buying the models, Mr Buller said there was the time and effort taken in creating the lifelike layouts, and that's something his wife has taken responsibility for. It's part of a layout that can have up to five model trains running at the same time.
Mr Buller's display in Wanganui featured a goods train hauled by about four diesel locomotives and wagons laden with miniature stacks of milled timber and whole logs.
Only these "logs" were sourced from small manuka branches.
"There's no one thing about the trains I prefer over something else. I just like them all," he said.
Mr Buller's hobbies don't stop inside that special room in the family home. He also collects classic trucks and he's got three "at the moment", an indication that that collection is certain to grow. Just like his train set.