JoAnn George Kathy Barker already was having concerns that her elderly father’s dementia made it increasingly difficult for him to manage his life. When his doctor said he could no longer drive, Barker had to do something. A contractor was hired to build a 448-square-foot cottage in the backyard of her Tampa home. Her father enjoyed it for just 10 days before going into the hospital, where he died. But the house was still a great solution – this time for her mother, JoAnn George. (Her parents divorced long ago.) Last November, George was moved into the backyard “granny pod,” which has a front porch, living room, bedroom, bathroom, and small refrigerator – but no other appliances. Granny pods,…