What does What maintains one vice would bring up two children mean?

The phrase "What maintains one vice would bring up two children" suggests that the resources, attention, or energy devoted to a negative behavior or habit could instead be used to nurture and raise children. It implies that vices consume valuable time and resources that could otherwise contribute to the positive development and upbringing of young ones. Essentially, it highlights the idea that negative influences can detract from more meaningful and constructive pursuits, such as parenting.