You seem to have missed the point here. A Landrover does not a mobile home make. How are they supposed to live in a Landrover comfortably for 19 months?
The tent was on the roof so it should have been safe from most animals:
Then it's not so much fun any more.
https://www.drivesouthafrica.co.za/images/home/slides/landy-...
[1] http://www.thehighroad.org/archive/index.php/t-65646.html