Columbia Northwest has just announced a new non-folding travel trailer that weighs under 1500 lbs. The ASCAPE Utilizes a drop-floor to increase headroom while keeping the outside profile low. Being introduced at Louisville show this week.
Appears to be targeting small SUV tow vehicles with no more than two people that want to travel.
With that tall flat back it will take almost as much power to pull it as a bigger ultralight. A Ford Model A is more aerodynamic in reverse than forward since the air clings to the large flat rear end.
Seems like there are already a ton of choices in this market segment. I would be more partial to a scamp type design.