If you love kids and think the more, the merrier, then make your home kid central by turning it into a family day care center.
Income potential: The need for child day care services is projected to increase by 15 percent from 2008 to 2018, according to the Bureau of Labor Statistics. Weekly earnings for such services averaged $345 in 2008, the BLS says.
Investment required: Your state or local government may require special licenses and background checks. Your home may have to meet code requirements, often including testing and abating for lead, asbestos and other hazards.
Depending on the age of your home, your initial startup costs could be minimal to several thousand dollars.
To start The Creative Play House, her home-based preschool in Portland, Maine, Willa Vennema spent $600 to install smoke alarms and $1,200 for a fence. Learning materials and toys cost an additional $700. A contractor estimated a cost of $5,000 for lead abatement, but Vennema did the work herself.
Pros: You can be at home with your own kids while supplementing your family's income, Vennema says.
Cons: The day care part of your home will need to be kept clean and childproof at all times.