Did you ever do a cost analysis to see what the utility vs tax only savings are? I thought about this before but its slim pickings IMO.
I like the idea of a luxury cost reduction like installing solar to offset the cost of electric heat rather then dealing with fuel oil and over designed HVAC but I don't think I would rely on it for retirement savings because the costs of a decent livable system are pretty ludicrous when it breaks down (i.e. inverter fail). I have a feeling I would be perpetually paranoid about equipment failure if I relied on it for keeping even.
I do like the idea of building a cabin though. Only problem is I would need a legit septic system because I am not shitting in the woods or a fucking out house.
I think the most easy steps to take as a home owner or in general is to do your own work like yard, electrical, plumbing, etc.. being able to unclog your own crapper can end up being more profitable then solar over a 10 year period IMO, with no exposure to equipment failures unless your snake breaks. Ok bit of a stretch maybe 500% but still.. and cooking a few meals a day at least.. i heard those silicon valley people eat out 3 meals a day...