Dale, you may have to broaden your search to include jobs other then carpentry. I reasize that is your background, and I'm sure that you are good at it, but until something in that field opens up, don't close your mind to ANYTHING that brings in money, even if it is less then your are used to earning. Asa someone else mentioned, check the Craigslist classified, checking ALL job forums. Even a parttime gig here and there bring in some $$.
Check with your local high school or trade school that have auto repair classes...with some luck maybe they can use your van as a class demonstrater in making the needed repairs.
If your wife does not get paid for taking care of your mother, check into your State Social Services programs, they may be able to pay.
Check with your local Employment Security office, for job listings.
Etc.,Etc.
Be creative, resourcefull, and followup on any/all leads.
Good Luck!
Mark