"Open A Designer Pie Shop - How to do it with just two people", and "Bunzwich, Soup & Salad Shop - How to do it with just two people", are books that can put a couple, or two others, in business on their own. And for an unusually small amount of capital. The two business can be operated as is, or combined, adding just a few pieces of equipment.
In these times of economic struggling, the possibility of being in a business that is easy to set up, easy to operate, and leaves time for a real life, is hard to resist for people who want and need to depend upon themselves.