Since a $200,000 Bruder isn't in the cards, an Ember is a great blue collar alternative.
That said, I'm looking at a new 2026 Forest River No Boundaries "Beast Mode" (hang on, take it easy. I don't like the gimmicky name either) for it's Curt independent trailing arm/coil spring/dual shocks suspension.
All trailers can have very fine gaps here and there. The way to combat dust intrustion (and this works, by the way) is to introduce positive cabin pressure by way of ducting near or on the roof, away from the tow vehicle's and the trailer's dust trail. I can offer video proof of this using my own ducted setup on a small 5' X 10' cargo "squaredrop" camper I made. I just don't know where to upload it for viewing here.
A feller I'm familiar with has a 2024 No Bo 19.6 (model nomenclature, a dual-axle, 20' box, independent suspension affair) and he has had ZERO issues with his in the just over two years' time he's owned it. He and his wife have taken it out camping more than they are at home. It's nuts. I think the reason is twofold: 1. We are past most of the horrible conditions created within the Covid outbreak and scare.
2. The Curt (borrowed from an OG Australian off road "caravan" design) independent suspension is a GAME CHANGER and drasctically reduces the vibration and road shock that create RV trailers "rolling (road) earthquakes".
Boom. Made right smack at the beginning of labor and supply chain shutdowns during those years.
Here's what I'm looking at. It's a big, small trailer. I had wanted a shorter box but this floorplan is about perfect for 2 people, and the "Beast Mode" includes not only the great suspension system (it's not Carli-level materials quality, so no "g-moon"ing it airborne in Baja or BLACKCHERRY 80 MPH through desert whoops) but treated with some mechanical sympathy I am confident it will go anywhere my fullsize Super Duty Tremor w/ it's longer wheelbase will go.
Here's a one minute, eleven seconds video peek at the suspension as well as the rest of the Beast Mode package items such as solar, etc.
Cheers!