Purchase 150...200kW diesel-generator and power up your house. With savings vs. electric company you'll justify your expense. This could run into $20k from the beginning, but savings on electricity usage will be approx half-way down if not more. If you have diesel automobile, you can also benefit from tax-free heating oil in your fuel tank that would add another savings.
Otherwise it's your choice, Furman vs. wall.
My choice would be Furman and Furman again.
Otherwise it's your choice, Furman vs. wall.
My choice would be Furman and Furman again.