Start with custom builders that can do the terrain: https://www.oka-atv.com/about-oka

Drag in the tradies that can do electric: https://www.abc.net.au/news/2023-07-30/nt-world-record-darwi...

Get this: https://www.youtube.com/watch?v=fchq6F-gKkQ with a variation of that: https://www.solarbatterywarehouse.com.au/solar-battery-shop/...