I think most commonly: have minimal responsibilities to begin with (no kids, pets, business to run, etc.) If those aren't an issue, costs are pretty minimal, a

I think most commonly: have minimal responsibilities to begin with (no kids, pets, business to run, etc.) If those aren't an issue, costs are pretty minimal, and it's mainly a matter of the long term career and retirement savings implications of not working for several months - those wouldn't stop you if you wanted to do it, they're just a judgement call.