Hi! from a fellow Toowoombarian.
It's obviously very horses for courses, and I have to confess to not making the show and not seeing the campers you asked about.
I would suggest trying a few different styles of campers before jumping in the deep end. There are a few local hire places plus you can borrow people's campers if you ask nicely :)
My parents had a standard flip-over-fold-out camper and I think they are a good substitute for the canvas 12-man freestanding tent with tarp-covered kitchen. What they aren't is quick to set up or pull down.
I have a modified Chesney Kampa (from 1974) which has been fine for us but is a little more work then newer wind-up campers. The advantage of the wind-up, beds-out-the-end campers is that everything can be ready to use with only a few minutes of setup and packdown. I think my parents had concern about the rock-and-roll potential of the beds out the ends. Just make sure the stabilisers are down and you'll be fine.
A good, cheap, option was how Dad got their camper: he separately commissioned the trailer and the tent from different firms. That way he got the price/feature balance he wanted not someone else's compromise. The tent was custom-made for the trailer.
But I do think that second hand can be very good value as few people give hard use to their camper.

