Unless It was a van with PUAL Construction, I’d avoid any vehicle that had had a damp repair, regardless of quality or warranty given.
I’ve personally known too many owners that have had ongoing problems, almost to the point of scrapping vehicles, even after returns to the factory, or 10k repairs.
If it’s damp - walk away, simples...
FWIW, Rollerteam appear to still be using timber framing (as I would of expected)
Two things to consider with that video. It's the models that pre date mine. The floor yes wooden, roof and above cab bedroom no clarification in that video, although their website indicates not. As above I'll get a second opinion and be swayed by that and if needs be go back to the dealer unless my 10 days proves such.
I'm beginning to wonder if ownership was the right thing to do. It would appear, according to many that unless they are kept inside 24/7 and never exposed to rain they disintegrate.