A car seems like a waste of money - I would have offered Bigelow a free ride to space for one of their biggest habs, if they'd accept the risk. Come on - give a leg up to your fellow spacefarer, or something - but a car seems like a wasteful indulgence. Ultimately, it's just another piece of space junk to clutter the solar system with.
This is the attitude that has killed space exploration. The strange disdain of fun. The solar system is made of junk. Planets are just accreted junk piles. So this seems fitting to me.
Bigelow, 'shudder', a lawsuit magnet.
If you absolutely have to be practical, they might monitor the car to see how various materials behave, in particular the battery, as they are going to need a lot of them, eventually.