You specifically asked about off the grid builds, so I'll add a little more about mine:
1. Like I said earlier, I've got grid power available at my site, but based the costs I've seen in our area for similar locations, I'd probably be looking at $6-10K for hookup. On top of that, I'd have the monthly cost to serve electricity, even if none were being used. I just decided I didn't need it. If I use 25-30 gallons of gas a year for my generators, it would be a lot. Plus, I like the idea of being independent from the grid.
2. I wired my entire place with LED lighting. I've got a 220V pump. I've actually got two generator hookups, one for a large (7500 watt) 220V Generac, and a second for a small 120VAC Inverter (Honda). Obviously, for safety, I've got it wire up for either, but not both to be connected at the same time. If I'm running power tools or have a need for the pump, I run the large gen, otherwise for lighting and small appliances, etc, I just use the Honda. The Honda is miserly and seems to run forever on very little gas. I can have every light inside and out on with the Honda and it never comes off idle.
3. Eventually my plans are for a solar system, but currently I have other priorities.
4. Having a deep well and a constant source of water is invaluable. I actually drilled the well before I even had my building done. Like I said above, I buried 4 fiberglass bladder tanks at the well site, below frost line, I have a frost-free hydrant there. That was something recommended by my well driller, and it's worked out fantastic. I also had a Wintrex valve installed at the well site, which is a valve below the frost line with a handle you can operate from ground level. It's equipped with a valve stem so you can shut off the water supply, hook up compressed air, and blow out the downstream line(s) wherever they go (cabin, building, outside faucets, etc). That's the extent of the winterizing.
5. We've got a on-demand hot water heater purchase for a couple hundred bucks from Amazon. It runs off propane and has battery ignition. Really simple, and nice to have hot water available.
That's a start. Let me know if there are additional questions.