Dating Single moms

Good idea or bad? I know four of them. One has two thirty year old daughters still living at home that she supports. One is my age and has a girl in ninth grade that's mentally ill. There was the one that died that had four kids out of marriage with a guy that ran off. And another who had three girls. She married a guy with a daughter. The daughter got mixed up with drugs, had two kids and now the woman and her new husband are raising them and they're in their sixties!