That's a huge difference, I would take the job. You said you're currently in a family business which means when you get laid off of the other job, it should be easy to return to your grind after you've made some decent money.

If you can't return but you're also confident of your skills, you could land a different job or start a business.

Take all this with a grain of salt of course, no one knows your situation better than yourself, just think in terms of risk tolerance