Steve, there's a thread just for you! Don't look at each post as an entirety, but bit and pieces. Interiors
What you're asking... is not so much as an entire change to the interior (cabinet changes, etc.) but "decorating."
Are you a person that likes "art deco"? Maybe raspberry, black and chrome, or NASCAR... you get the idea?
Flooring, upholstery, window coverings, throw pillows, etc. etc. etc. make your trailer uniquely your own!
I've never seen two trailers exactly the same... no matter brand or model.
Exactly what are you looking for?