I took a 6 month break 2 years ago, right after I turned 30. I spent 2 months in Africa and got a fun tour guide job when I got back, in the states. The seasonal tour guide job experience led to a permanent position in an environmental conservation non-profit later (part time). 5+ years in health insurance, sitting over 10 hours a day at a desk and in a car, just burned me out.
I had less than 10k saved (1/2 of which was earmarked for paying off 0% promo cc debt within a few months, so I really could only count on about $5k). I kept my part time job (they were willing to do without me for the time I was in Africa...which I could never expect from a full time job), so I had that, plus some rental income from renting my house out, and the seasonal tour guide position provided me several thousand dollars I was able to add to savings. I used a 0% credit card to finance my low living expenses, and to book the tickets to Africa, with the confidence that I would be able to pay it back in time when I went back to work full time.
I never made more than $55-60k in a year (and that was a high year). So it is doable. I have over $80k networth at 32 which I'm proud of for not making so much and taking that break which should have caused me to spend my savings, but surprisingly I never had to touch it and even added to it. Benefits of being accustomed to not earning a lot is I had a very cheap lifestyle which was easily covered by the rental income and part time job.
I missed saving more money so I did eventually get a full time job in health insurance. But I'm planning another break in 3 1/2 years. I figure 6 months every 5 years is good for me. To accomplish this I need to add a couple more investment properties. And eventually I hope to permanently retire from working full time before I am 50, living on seasonal/ part time gigs and rental income. I never would have had the idea or courage to have this goal without the break. Just to see that I could do it. That it was possible, was amazingly eye-opening. And I feel less dead inside the 2nd go round working, since I have something to look forward to (and actually missed working full time a tiny bit).