This plays out all over the place. Take San Mateo, California:
* Median pre-tax household income: $103k
* Post-Tax: $70k
* Median home price: $1.6M (~$1200 USD per sqft)
* 400 sqft: $480k (note: this is without the 20-30% premium you'd pay for smaller properties)
* 15% downpayment: $72k
Housing prices are broken all over the place...