3 mile/wk half marathon training plan

This training plan will never be recommended anywhere but it can be done. Finished the North Olympic Discovery marathon with a walk/run method that I learned is called "wunning" and averaging 3 miles of running a week. So after 13.1 miles, my legs were in shock and are just starting to forgive me now. Seriously, will try to train properly for the next event. But if time or life doesn't permit, I know another 13.1 is doable if taken slowly.