And another thing… being comfortable is only relative to a point. I think there is a specific meaning the OP had in mind when he said "comfortable." As in…. what amount of money do you think you could live with and be happy, even if you didn't reach what you hope to be your fullest potential…
For instance… I hope to be making 150 - 200K at some point. But I could live comfortably at 50K.
I would like to have a 3500-4000 sq ft house… but I could live comfortably in a 2500 sq ft house.
I would like to drive an audi A8, fully loaded…. but I could live comfortably with an audi A4 with the sports package.
We're not talking about your ideal situation… we're talking about, at what point would you be comfortable, even if you didn't reach your ideal situation, UNLESS your ideal situation is the ONLY way you'll ever be happy.