Some good points indeed.
I suppose of you approach it from the other direction (looking for where power can be saved) as well as how to create it then a compromise could be found.
If for example I were to:
- have a couple of extra batteries
- Daily exercise on a pedal powered generator instead of my daily run
- a couple of good solar panels
- use iPad instead of 27inch iMac
- ...and finally accept the fact that I might occasionally need to use the engine!
Then that could be a happy compromise