“„“We’re seeing greater numbers of marginal people,” said Kirby Dunn, executive director of HomeShare Vermont, one of several hundred programs around the country that have been formed since the 1980’s to help elderly or disabled homeowners exchange spare rooms for income or, more often, help around the house, but now being pressed to meet different needs.“Historically,” Ms. Dunn said, “the people who come to us have been looking for someone to provide services in the home. But now, money is the bigger issue for folks. There’s definitely an increase in people looking for a revenue stream.”Ms. Dunn said volume at the agency was up this year, with three or four times as many people seeking rooms as seeking boarders.