Buy the Radrover with the "mad money" you have set aside out of the ladies view. Tell her it only costs $600, or get a new lady. Maybe she just wants you on a death trap to collect in the insurance money anyway. Lol... Of course I'm just having some fun joking around!
It might be able to be done, but it won't be a Radrover. I'd work on the relationship approval and get what you want.