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It really depends on which city you live in. 72k is more than enough for most small cities. Where would you live?

Mountain View

No way - well if you live very frugally and don't do very much - maybe

If I could downvote you I would. I lived in Mountain View and I assure you he can live there on $72,000 a year no problem.

Don't listen to the other guy. Having lived in Mountain View not to long ago, I assure you you can survive there with $72,000 a year.