Lorraine Brennan is not a woman daunted by a challenge. When she and her husband bought a house by the side of the road in Northfield 20 years ago, it was surrounded by what seemed to be acres of blacktop parking lot. Now it is surrounded by what seems to be acres of garden – trees, shrubs, and perennials. Especially daylilies. The house by the side of the road, Route 10, was perfect for Brennan’s antiques business.…