For the curious
Paul has a new book coming out called Company of One
in January. He also publishes a weekly newsletter that's one of my personal favorites called the Sunday Dispatches
On the podcast he broke down some interesting revenue numbers. His business makes about $500k per year and he isn't trying to grow beyond that.
He spends $90k of that on living expenses and about $70-80k on business expenses (mostly freelancers almost, no software). After taxes, the rest goes to savings (over half of his revenue).
That's amazing and we talk about how he did this on the podcast.