Thanks to lifejoy for linking to this thread, I missed it the first time around.
Sounds like you're doing a great job with your spending, OP!
To me the primary level of badassity of a Mustachian would be optimized spending with zero deprivation. If you can get your spending to a level you're completely happy with, without depriving yourself at all, that's the initial goal.
There are so many factors/variables that it makes direct comparisons mostly meaningless. The COL of the area, paid off house versus mortgage or renting, some sort of hack that gives you free (travel/pizza/whatever), kids or not, etc. etc.
I recently ran some numbers and figure the wife and I could live on about 9k in Chiang Mai (3k/person for our 3-person household), if we were to stay there a year. And not just a "could" live on that, but would--we wouldn't have anything else to spend the money on!
We won't live there a year, so we'll have higher expenses doing other things, and being in higher COL areas, and spend maybe 20-25k traveling the world as 3 people (and could probably also do it for half that, if we didn't visit expensive places occasionally), but it's worth the extra money.
Our goal is not to minimize spending/maximize money, but to maximize happiness. Thus the first level of spending, mentioned above. We've actually never purposefully tried to spend less, and we occasionally try to spend more.
Sounds like you're very happy with your spending, which is awesome. That's the goal, and having it low on top of that is even better, because then you aren't wasting resources, and can direct excess to more worthwhile endeavors (reaching FI, charity, etc.).
