Charlie is a great story because he's showing you can live a relatively normal life and be a national class runner. He was one of my teammates in college and the guy literally does not stretch/do core/lift/watch his eating, or do any of the ancillary work people obsess over.
On one hand I think that's an important lesson. Want to be a better runner? Run every day, twice a day most days, and repeat. Everything else falls into place. But, I think also leaves Charlie with some exciting upside from a sponsorship position. As his coach said, just being able to afford to work a few hours less a week would make a different (generally Charlie leaves early 1/week to workout, his coach thinks it would be a perfect situation if he could do that 2/week).
If a shoe company could just help him get into bigger races next year, I think he can run even faster. And even if he never makes an Olympic team, he could end up having a pretty marketable story as a low 3:5X's guy guy.