You would have put yourself in other after the demised of your client. And also you would have looked into your business capital to see if it could sustain the business and it was not them you would have changed business to another business that you would have done better. Those are so.e the business strategies. You don't have to stick to one business when you discovered it was not doing well again as the beginning.

I will advise you to divide your business idea into two so that if one side goes down then you use the other one to support it.