Jack,
The 17 foot is the largest trailer that
Casita makes.
Scamp makes a 19 foot 5th wheel, and their largest regular trailer is 16 feet. But these trailers use their space very well. You would have to be inside one to see what I mean. They are great for a couple or maybe a couple with small kids.
If you are looking for something larger, then you should probable look at a
Bigfoot , if you want an all
fiberglass unit.
If you would like to see a trailer almost anyone will be more than happy to show you theirs. Or you can call
Casita and they will give you some telephone numbers of owners in your area.
Good Luck