dutchman wall construction

I am considering buying a 2011 dutchman 265bhs. It has smooth fiberglass outside walls, but I couldn't find any info if it was aluminum framed or stick framed.I would prefer metal framing.
any info would be appreciated.

And if anyone has this model,is it a good one, or were there a bunch of problems.The current owner said the roof had to be replaced during warranty.

Thanks for any replies

Len