Realistically, you have to look at it from a "convenience/dollar", since power outages are generally rare.

With the general infrequency of power outages in most places, getting portable quiet generators like Honda EU ones and running an extension cord inside your house is pretty much the most cost effective solution. You can chain 2 EU3000is together for 6000 watts, and only spend $6k, and run them out of your back yard without disturbing the neighbors.

The other issue that you have to consider with Lightning is that while its good for occasional outages, for every watt you use, you slowly lose the ability to drive away if shit goes south, with no easy way of effectively getting that charge back. If anything, the current Hybrid F150 is the better choice for powering your house.