I think I will first investigate on why and the business failed. If it is something that can be easily provided a solution, then I think I will think of investing into that failed business. I will just create a new business then if the problem will require a lot of money. It's really up to you to make a wise decision.Is it a good idea to invest in a failed business? Do you think it is a wise decision to bail out a failed business so that you can give it a new life? can a failed business become successful by investing again?