[FuriouslyAdrift]

I'm in a leaky, 80 year old 3 bed 2 bath in the Midwest (that doesn't have insulation in the walls... brick and plaster). Worst in the Summer is around $100/mth, worst in the Winter $40/mth (of course gas for heat is around $80 Winter, $15 Summer for water heater, stove, etc.).

[floatrock]

Ok, sounds like it doesn't pencil out for you in your region. I have a similar size in a different part of the country with my bills consistently in the mid-$100's.

YMMV. As with most things in life, there is no one-size-fits-all. Do what's right for you.