[lisper]

If you're making 7 figures (i.e. >$1M/year) you can afford to save $0.5M/year. After ten years or so you can retire. I think that counts as being able to "afford" (an average of) 30 days off/year.

[Veelox]

10 years? Try again, even if you are burning 200k a year you can do it in 5 1/2 years.

[lisper]

Depends on what kind of lifestyle you want to be able to sustain. Also, I think you might not be figuring in taxes.