In fact, they say they could have achieved financial independence even sooner if they'd avoided a few mistakes along the way.
They're now at the stage where they don't technically need to work, although they do choose to work part-time in order to have some extra fun money.
That's what the financial independence world calls becoming "work optional".
So how did they do it?
For the latest podcast, I talked to Ruth Henderson, also known as The Happy Saver.
For the interview, listen to the podcast here.
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• Listen to the full interview on the Cooking the Books podcast. You can subscribe on iHeartRadio, Apple Podcasts, or