Well done.
I did the same about ten years ago. After the initial "WTF do I do?" I decided to freelence in the motor industry.
Worked for a few race teams, a few colleges, myself, Prodrive, Hot Rod shop in the US and lots more.
Saw the world at someone else's expense.
Ended up far better off than working for my old boss, though after ten years absence I'm back working for him now(!)
Oh, I had young kids too, and they've both grown up as total petrol heads.
DO IT!