Hate to burst their bubble but propane is not "renewable".
In Minnesota, there a some dairy farmers who use cow manure manure to power an anaerobic digestor.
They provide plenty of power for their farms and often sell power to local co-ops.
It's not a bad idea - if you can afford the upfront money to construct the digestor. It's a practical use and environmentally-friendly way of disposing of cow manure.
It's saving us thousands.
Electricity must be expensive out west. I could pay my electric bill for more than 30 years for what this cost. Hope there's no maintenance.
I don't know, it seems kind of pricey for a feel-good kind of expenditure. Nuclear-generated electricity wholesales for around 3 cents per kwhr. Assuming an average household using about 1 kwhr at any given time, on average, $23,000 buys you a little over 87 years' worth of electricity. Unless you are planning on passing your homestead along for a couple of generations, you probably aren't going to realize much payback in an average homeowner's lifetime.
I lived off the grid for ten years. I like the grid. I can still produce my own power in emergencies, but the grid requires no labor or maintenance expense on my part.