I'm not sure how good that calculator is...
Provo-Orem metro in Utah has access to dirt-cheap public transport and childcare at under half minimum wage on every posting board. You can get anywhere you want with a bike and the bus. Obviously, some/all numbers will be inflated by non-Mustachians. Same for most of what's north of there. Easy access to whatever you want, lots of cheap open land and real estate.
However, Litchfield county CT is listed as being slightly cheaper than SLC County in Utah, with almost the same housing cost (what...?). North of Danbury, CT, most or all public transport dries up within 20 or so miles, childcare costs beat most part-time jobs, housing is higher than the 230k-ish CT average, and yet it's listed as cheaper than SLC to live in (and with lower taxes, but UT has no car property tax and the mill rate in the areas I looked is around 25-75% that of CT for property). CT mill rates go from about 13 to 44 unless the town has no school. Take a peek at Torrington - they're paying for the same infrastructure with a shrinking population as the only major NWCT metro. Distance between towns is 10-20 minutes by car. And the minimum wage is wrong by years - it's $10.10.
I would seriously love to stand corrected.