G'day & Welcome.
Hell of an introduction mate, hope this works out for you.
I agree with quite a few points above:
210kg ball weight sounds too much, and so if you're making decisions on a new vehicle it is worth checking. Any local weigh bridge will do it for $nix-10.
The new dual cabs are as big as a Cruiser these days. The Ranger looks massive when I follow one.
If you haven't already, post a pic or two of your camper and maybe from that we could offer some ideas about weight distribution etc.
Good luck.