It is a little stronger than the prototype, and a little heavier, but this is a trailer for staying inside, carrying nice things that makes the off road challenges a little easier. Most would never take this type of a trailer on the toughest trails, it is a large investment, most would protect that investment I think. So I am not as concerned about the weight as I once was. I have drug mine places that under normal circumstances I would not have, but testing and finding out what worked and what did not forces you push the envelope.
I weighed the frame yesterday on my way to have it rhino lined. With 35's, axle, brakes and the spare carrier it came in at 1040 pounds, my guess with water it will hit 23-2500 pounds when finished. Mine loaded when I last weighed it was 2200. And I never had any problem getting it anywhere we took it. It actually got better mileage than my tent trailer due to the sloped front end I think. Mileage on the Kokopelli run was just under 11 mpg, including running around town for a week in Moab. I drive it at 60-65 towing.
On the doors, I bought them directly from Little Guy Tear Drops, so I imagine they are specially made for them. I will research a number on them for you if I can.