In the world of luxury construction, reputation is everything. For Cindy Stumpo, founder and principal of C Stumpo Development, that reputation has been earned over nearly four decades of work- brick by brick, deal by deal. Today, her Massachusetts-based firm develops and builds speculation and custom homes ranging from $ 7 million to $ 20 million, serving some of New England’ s most discerning clients. But the story of how she got there is as remarkable as the homes she creates.