- Electricity: Modern solar tech is suprisingly powerful. We have a tiny 1.6kw system with 3kw batteries plus a Chinese inverter which works amazingly. While it is small, it only cost about $2k altogether, including fittings. We installed it ourselves for the miniscule cost of risking our lives on a roof that's ~30 feet high :)).
- Water: Next problem was water. We already had a 42m deep well, we just bought new pumps and some tech which controls water flow, so when you open the taps and pressure decreases, the pump starts. Works beautifully. Overall cost is a few hundred dollars for parts + installation, which we also paid a few hundred dollars for (we don't always have time to do things ourselves).
- Heated water: once you have water you quickly realize 10C is not always pleasant to shower in. So for $150 we bought a water heater that heats water by 25+ C as it flows through. It works with a gas cannister since our small electric system is not powerful enough to heat water.
- Sewage: we currently only have a compost toilet (ie. a hole dug into ground with a shed around it). We are moments away from having a proper English toilet and a septic tank (? another hole dug into the ground, but this time connecting the toilet inside the house to the pit with pipes)
- Heating, cooking: we have massive masonry heaters and stoves all over the property. I think we heat the house in around -10 C for $3-$5 worths of wood per day.
All in all modern solar enables off grid houses at a scale we could not imagine even a decade ago imho. 10/10 would do it again.