How to Buy a Business That Folds In

Do you ever have an internal debate with yourself about whether to buy a certain type of business or start it up? I've bought businesses that have been disastrous and we shouldn't have bought them. And I've started businesses that have were disastrous and we should not have started them. But I can tell you the traits when you buy in businesses that fold in, and it's going to save your existing business expenditure. That is all the stuff I'm looking for.