There are some of us who have had to put our kids in school rather than continue homeschooling because a spouse has left the home. As a result, working in the home seems like it would benefit all of us.
Yes, I realize that one parent's departure or debilitating injury/illness can cause a dramatic change of plans. elc's post, however, sounded like that wasn't the case for her.
As for working at home, opportunities are obviously limited unless you already had an established profession that you can shift to doing from home (a friend of mine was well-established as a senior paralegal at a Philadelphia law firm, got married and moved to Australia with her husband, and kept the job!). And scams abound. One non-scam I read about a couple of years ago (in the NYT, I believe) was about a franchise-type business which checked medical bills for errors in exchange for a cut of the savings on charges which were dropped. I can't recall the name of the company, and there may be imitators by now, but it seemed to involve very little upfront investment, and provided a course in how to do the bill-checking and how to get clients (mostly insurance companies, as I recall). Sounded like a lot of the work was calling/e-mailing patients to ask what they really had done, and calling/e-mailing hospitals and doctors for explanations and evidence for suspicious charges. The article said a number of people were making quite a lot of money at this, due to the massive volume of errors and outright fraud in medical billing.