M.L.
If your husband can get a job, anything, even night stocking at Walmart and delivering pizzas during the day while he waits for his test, it would be helpful, and it would show employers that he remained busy during the downturn of the economy, and he can use his willingness to work no matter the circumstances as a selling point in an interview.
I work at home, though it in no way replaces an income and it can be time consuming.
Perhaps your job can transition you home? I would follow S.H's advice
here are some good tips regardless:
http://www.workathomeinfo.org/legitimate-work-jobs.php