Not sure it's fair to call a $120K - $140K† kit (not including the cost of having the engine and avionics professionally installed) "homemade", but still an impressive flying achievement for the 17 year old pilots.
I had the same thought, but if the team of 20 all pitched in equally that's only $7k each. Still not pocket money but it's much more attainable that way. If they got a grant then it could have been even less.
I'm glad he's able to fly a plane but at this point it really feels like we're cheering on the mid upper class for their accomplishments. I want to see some kid from the slums build a real plane from spare junk yard parts. That would be much more impressive to me.
I was still really impressed by the 12,000km (7,455 mile) trip... until I saw they made 6 stops.
Getting that distance in a little plane would be impressive. Somebody even went around the world, so it can be done. One ends up flying a wing-shaped carbon-fiber fuel tank.