There are no true failures, just adverse circumstances to recover from, thus making the people who put you in them regret their life choices.
Unless you die before your goal is achieved or you quit in the face of evil, leaving the goal undone until you are dead. Your blimp trip could happen at 50 and you would still have technically succeeded. Logically you would want it to happen much sooner so you have many years of blimp traveling and visiting interesting places, but it wouldn't be a failure.
Totally legit, and you have my respect for starting out already.
It's not going to be hard to make 6-figures in programming, engineering, or business. I think my brother got a 6-figure job right out of college in engineering, there are many 6-figure software engineering jobs, and business goes up to as many figures as you want to destroy your life to get.
I'd stay off the idea of a certain set of numbers, because inflation is still a thing. I'm pretty sure some of the folks in the Weimar Republic were making a nice 6 figures and starving to death. I also am sure you have figured that out already and included all of the political instabilities in your grand calculations. My point is that the 6-figure standard is faulty, and it is best not to hang onto it as a barometer for success. It might work temporarily for the moment we are in, but if an electrical engineer can earn it out of college, I think the 6-figure standard may be out of date. Granted, my brother had a masters' degree though, so shrugs.