Now the King's Foundation based in Dumfries House, a sprawling 2,000-acre (809-hectare) estate in rural Ayrshire, southwest Scotland, will be at the heart of a new Amazon Prime documentary "Finding Harmony: A King's Vision". Dumfries House is where that vision is "put into practice", Sadinsky told AFP on a rare media tour of the estate. "Wherever we've got a building, we try and plant for the purpose of the building," explained Melissa Simpson, the head of horticulture at Dumfries House. Like the multi-million-dollar purchase, which was derided by some at the time as a vanity project, Charles's regeneration plan for Dumfries House "was a real risk", said Sadinsky. "The King's Foundation isn't a magic pill," he warned.