Sooo - we spent the $20k and bought a brand new camper. We have had it for about 2 months and only used it once for what was to be an 11 day cross Kimberley trip - had to be cut a bit short.
I wont mention brand yet (although it may well be mentioned in other posts I have logged) and have to say that warranty wise the company has been very good - but this much stuff should not go wrong in the first place and the camper will enbd up looking like a patch work home made job rather than a $20 outlay..
Issues SO FAR:
1) Electrics - battery monitor fused and burnt out - was replaced.
2) Shock Absorber mount (independent suspension) pulled away from Chasis - welded under warranty
3)Water tank split - welded under warranty - water tank split in a different spot - to be confirmed what repair is to happen
4) Spare wheel carrier snapped at base, Repair to be confirmed (RTBC)
5) Floor where battery sits sagging and pulling away RTBC
6) Battery doesn't hold charge RTBC
7) Seals (what seals??) RTBC

Crack on panel under Wheel Arch RTBC
So just a heads up (not that haven't been hundreds on this site already) Make sure you check out your camper before purchase - sadly we didn't have the option due to living in the Kimberley and buying sight unseen!!