Kent Aden, senior development manager for HomeFed Corp., the biggest landowner in Otay Ranch, has been with the project from the start. On a recent Tuesday, Aden crackled with excitement as he gave a tour of a village called Escaya, where many new homes are opening this year. Realizing the fruits of his labor after years of planning, he pointed out features on individual homes as workers painted walls and nailed pieces into place, and described the process that brought three developers into one project.