Maine HBA Takes Off From nowhere to everywhere in three years n the last Friday of summer, Kendall Buck, executive officer of the Maine Home Builders Association, put in a long day: Rising before 6 a.m., he was at the building site by 7 and stayed there until breakfast the next day, as he and some of his association's members raced to build a three-bedroom spec house, complete from foundation to paint, appliances, and shingles, in 24 hours. They actually beat their own deadline, finishing the job at 6.35 a.m. the next morning — 25 minutes ahead of schedule, and about 80 minutes after a family signed a contract to buy the place. "Twenty-four hours," said Buck