I concur with everyone who has said "well done! It is a worthy achievement and it doesn't really matter where the money came from".
Notwithstanding the above, I don't agree with the following comment:
He might be lucky enough to have well off parents, but couldn't the same be said that most of us are lucky enough to have jobs that allow us to be able to afford to fly?
With all respect, this is confusing apples and oranges. Most people who have well-paying jobs owe that situation primarily to dedication and hard work, of which they can be justly proud. Merely being born of wealthy parents (which may or may not be the case for this young fellow, I have no idea) is not a praiseworthy accomplishment (cf. the House of Saxe-Coburg-Gotha).