I met a woman who started a pooper scooper business on the Main Line(Rich people area near me) back in the mid-90s. She was the owner/manager but still kept scooping for her original clients herself. She employed about 20 other people which were a mix of retired people, college students and stay at home/single moms after she expanded the areas she covered. She said she was netting 6 figures a year scooping poop.