Hannah Grimshaw never planned to live with her parents again. But when Hannah and her husband Charles were searching for a new home nearly five years ago, they stumbled upon a residence featuring a pool/guest house. That particular house wasn’t “The One,” but the wheels started turning in the Grimshaws’ minds. Already the parents of a toddler with plans to expand their family, the couple considered their lives: Charles, an orthopedic surgeon, had a busy, growing practice. During his years of…