I think you really want your analysis to be true, so you're fudging the numbers to "prove" to yourself that it makes no sense.

- Taxes are not 50%

- Daycare is not $4k for one kid, though could be for 2

- You don't need a 3 bedroom unless you have 3+ kids

- Health insurance is a few thousand per year, max (employer pays most)

- Household expenses and food expenses aren't THAT much different from elsewhere. Do you spend $5k / month on those now?