Well, and see, I would turn the first two around that woodglue said. Floor plan was everything to me. Construction and materials number two.
The rest of I didn't care about at all. I bought from a dealer 600 miles away. Price was the deciding factor. Warranty means zero to me. I can fix anything that could go wrong. These travel trailers are very basic and simple. Anybody with a screwdriver and and a crescent wrench can work on one.
Options ? They all have what I want as far as options: an air conditioner, a microwave and an awning. That's it.
So that's my take on it....each individual needs to figure out what is important and what is not, and then write a check, hitch up and go camping. You'll figure the rest out along the way.
Believe me....these things are not complicated. They are only slightly more complex than a conestoga wagon.
Now then....if you are talking about a motorhome, especially a higher end one....things are going to get far more complex, very quickly.
And yes, I'm serious when I say this to the OP....for sure....do your homework, but don't try to make it more complicated than it really is. All that will do is drive you nuts, and you could waste years just looking.....and not camping.