He needs to contact old clients and have them refer friends and family. If he did quality work he will have more work than he can handle in most places. He may need to work as a sub contractor if he can't get contracts or go to remodeling instead of new construction.

Get your Dad to knock door to door and ask for renovation works and in no time he will be working again. A lot of people out there can't find reliable builders.

fold up shop and go get a real contruction job at Home Depot.

My dad is a very experienced, self employed contractor. We used to have a lot of business. But now he doesn't get any work. We can't afford insurance or anything anymore. Any ideas to help us get back on track?