Things are tough, how to show your support?

My husband works nonstop (handyman jobs and charter fishing) and I left the corporate world to be home with our two girls. We are making it, and I'm good at finding things for our girls to do to have fun and stay healthy. I am bringing in some money on line and trying to increase that amount. My problem is the financial stress is really bringing my husband down. I think he feels like a failure because we're always just making our bills by their due date.