Each time a nose is operated on, it becomes more difficult. And therefore the success decreases and the goals of surgery are lowered. The first time is the best time. That isn't to say revision surgery can't be successful. Its just more difficult and takes longer. This is reflected in the cost. A primary nose job usually takes between 1 to 2 hours, while a revision takes between 2 and 5 hours. There are outliers, minor 'touch ups' or complete complex nasal reconstructions using multiple ear, rib or skull grafts.
I have recently set a new personal record of sorts. I operated on a young lady for the eighth time! She had, over the years, had 7 surgeries of one description or another by the same surgeon. I wouldn't recommend this. If a surgeon can't achieve mutually agreed upon goals after 2 surgeries, it time to move on or up. Will your nose fall off? No. Will your nose be straight? Maybe. And you increase your chances by taking the time to find the best, most experienced rhinoplasty surgeon you can find.