380 meters? Over that distance, everyone is likely to die... unless it's installed by a licensed tradesman.
Seriously though, would it be that far? I remember you driving us to the shed but I thought that was just so you could rest your hand on my thigh. A couple of 50m leads would be stretching it but there'd be a fair bit of volt drop at 380 meters.
Gennies might be the most viable option. The pumps would draw bugger all and some LED battens could provide light without too much demand. I've got an Aldi generator that needs some TLC but could be resurrected for a good cause.
Orrrr.... we all chip in and send Mrs Cocko to a fancy hotel/day spa for the day...