When Dragonfly Foundation co-founders Ria Davidson and Christine Neitzke started talking about a new space for the group's patient/family retreat, called the Landing, they had no idea they were starting on a journey that will create a community unlike any other in the nation. Working with Dan deStefano, president of W.V. deStefano Homes, Dragonfly board member and chair of the development team, the foundation assembled a team of some of Cincinnati's most respected designers, builders and developers…