Salvation Army Lt. Matt Cunningham stood in his full uniform on the roof of the Slack Auto Parts store on Main Street, playing Christmas carols on his baritone horn as he waited to lower his red bucket to the sidewalk for donations. Until he raises $10,000, the roof is his home. The charitable organization’s annual Kettle Drive is five days shorter this year and the local Salvation Army office hopes to help more than 700 families this Christmas.