You can't really be sure about that, after all, his employees could promptly retire now that they're rich. (Though, this seems very unlikely)

$125,000 is a decent bit of cash, but it's not enough to retire on, especially after taxes.

In Argentina you could buy a house near the capital for about half of that, and the rest would pay frugal-ish expenses for several years. Not enough to retire on, but plenty of runway for the next project.

that depends completely on where do you live. here in eastern europe it'd be _almost_ enough if you had nothing to start with and was smart about handling it.

in the us, that's 3 years of entry-level salary in software development...