While I have been poking fun at some of the concepts, the basic idea is not that impossible. I have worked with folks who built one of the Mars rovers, and fundamentally it wasn't much different than a yard cruiser. Built very, very carefully so that it could survive the rough ride on the way there, and because it is such a long way to the repair shop if something breaks. There was a bit of the work that had to do with the Mars environment (picking batteries and other components that can survive low temp) and a LOT of testing to work out infant mortality and mistakes, but it is surprising how much works without modification.
Even things like the plastic body may not be a no go. They only last a couple years here on Earth. If it lasted 6 months on Mars it would fit nicely in the population of rovers built by large professional organizations. UV on Mars will be a lot worse, but at least once it gets there the stresses will be a lot lower. Only 1/3 g, and absolutely, positively no toddlers.