Wait...wut? I've never ever seen a farmer with any form of range rover. Landies yes, but not the fancy pants version. We use a hilux on the farm, and I bet it would tow 3 times more than your range rover (While also doing at least twice your MPG)
Also, you don't need a range rover to pull a car and trailer. God, if it's on road the whole way I bet my Yaris would pull it