"They're athletes too," Jonelle says of their horses. "They have to be so fit to stay at that level and endure the physical work. We're just pleased to have back-up horses, in case any others go by the wayside."
The Prices arrived in 2005 after a couple of seasons commuting from Canterbury. Like many prospective overseas riders, including Sir Mark Todd and Andrew Nicholson a generation before, they had relatively limited financial means but plenty of ability. They needed contacts and avenues to demonstrate their prowess. Nowhere can service those ambitions like Britain and Europe from spring to autumn.
Both have finished in the top 10 of four 4-star events in the last two years. Jonelle's best is second at Luhmuhlen in June - a 4-star title still eludes her. Tim won the same event in 2014 for his maiden title.
"Before that I was nervous about the unknown," he says. "I beat Michael Jung that day [world No.1 and defending Olympic champion]. We've also had a couple of other good bouts when he got the better of me [at 4-stars in Kentucky and Burghley] but challenging him is confidence-building a year out from Rio."
"We are fortunate we combine our business, hobby, passion and careers," Jonelle says. "On the flipside, it has taken a while to get to this point because it was about making a business work first and foremost.
"We've got a really good deal. It's rare in this country [England] to actually get on with your landlords. We've witnessed so many young Kiwis move at least half a dozen times, which can be a difficult parallel step. Tim and Melissa Brown [the landlords] will be lifelong friends. They entrust us with making the decisions so we can use their farm as we need to.
"Many of the other New Zealanders have come to this area as a central location. It's like 'little New Zealand' sometimes. There's about six of us within 45 minutes. "
"We were lucky," Tim says of a property which has 360-degree farmland views, yet is only about 5km from Marlborough township. "It was a run-down farm, beautiful but a bit of a white elephant which required investment to make it functional again. Tim and Melissa bought it about a year before we moved in.
"It was the perfect arrangement. We didn't have many horses but the rent was low so we could put a lot into the place, which equalised out our rent. Every fence is now post-and-rail. The more we got established, the more rent we paid. It's their [the Browns'] farm but it was ideal for us with an arena, stables and beautiful woodland."
The Prices employ a staff of around six to develop horses across a range of levels. Tim's reputation for breaking in horses helps convince owners they are worth the investment; Jonelle ran her own catering business which provided income on her way to gaining selection for the London Olympics. Tim is yet to attend a Games.
"There aren't many spring chickens in our game," he says. "Even people lucky enough to have a lot of money still require a team to own horses with them. Being a talented rider isn't enough.
"We came over with no decent horses or owners so it took years to get established. Once we had that we could hold rather than sell some of the better horses. "
The Prices' Rio prospects are strong but two other New Zealand riders - Nicholson and Todd - are in the world's top 15. Jock Paget recently dropped from 17 to 47 but has four-star winning pedigree. Three others - Caroline Powell, Lucy Jackson and Clarke Johnstone - are in the high performance squad. Only four riders will be taken to Rio, rather than the five selected for London.
The Prices are proud to be at the forefront of a new generation of Kiwi riders after the initial wave in the 1980s and 1990s.
"There was a 10-year lapse through Athens and Beijing [Olympics] when we [New Zealand] were in a real hole," Jonelle says. It's great to step up and return things to the way they were."
