I'm inclined to agree. If their wiki is true, they were just doing it out of rather pure interest with no financial backers whatsoever until later on. In fact it made it sound like other countries basically quit funding some other claimants listed in this thread because of how bad they turned out and assumed the brothers were scammers making fake claims. Until they showed up one day and flew circles in the air.

That pure drive of doing something out of sheer interest and refusal to accept failure is really inspirational. I wish I had half the drive they did!