Perhaps you feel you're unlikely to need an emergency management plan, a lot of people think that until they're confronted with an emergency and need a plan.  In the case of disability entrepreneurs, one emergency might be a surprise change in your symptoms and capabilities, so that you are no longer able to operate your endeavour.  For some disabilities this might not be a question of when, but how soon.  This government resource has some good ideas for your plan.  Hmm we might go off and work on our own plan now.