Hmmm, you wanted a sensible idea from me.............??? How bout this - keep the vehicles you've got, who-ever is going longest distance on a day takes the might diesel wagon, & umm, buy yourself a motorbike for using on the fine days - ya know ya wanna............
Like, a proper motorbike, not some sorta tractor like a Harley...........
Edit - In terms of Freelanders, I personally wouldn't pi$$ on one to warm up its wheels.............however if you do get one, get one with sunroofs. Then when it dies, ya can full it up with horse-$hit & use it as a glass-house for growing tomatoes etc..........