Electricity: solar panels + batteries. You will need a lot of them if you want to run a small fridge. Forget about a gaming desktop.
Internet access: LTE via a tall antenna if you're lucky, Starlink otherwise. Add more solar panels.
You'll have to limit your diet mostly to foods that store well without a fridge. A tiny fridge can still fit the power budget.
I'd say that sewage and trash disposal are going to be bigger problems. Having a shower, too, especially in winter.
