Sounds like he doesn't have a wife and kids!
I used to Kitesurf with these guys when they were still at MIT. Awesome bunch.
[edit] apologies, I thought you were talking about the Zero Prestige founder and now realise you're talking about the parent's anecdote. As someone who builds his own kitesurf gear, electric vehicles, maintains an old house and has a wife & two rambunctious boys - it's totally doable.