You mentioned DIY in your other posts but I'm not sure how much DIY you really meant, building the entire trailer or just outfitting. If you meant building the trailer then you might be interested in the route I took, a "kit" from
Dinoot trailers. I've had a great experience designing, ordering and building my trailer. One of the best things about building your own trailer (other than looking at it and thinking, "damn, I built that thing") is that you know how it goes together so repairs or future modifications will be easier than trying to reverse engineer something.
They have a few models available and are 100% un-outfitted, it's all up to you. I chose the Compact J-Series kit, told them what wheel/tire combo I planned to run (same as tow vehicle) so they could correctly size the axle and choose the right lug pattern hubs and any options I required. A few weeks later i received a pallet that contained a frame, axle, springs, the fiberglass tub in pieces, fender flares, lights, safety chains, etc. (They also can provide instructions to modify the trailer available Harbor Freight if you plans are for mostly on road or dirt road use.) Following their clear instructions I built the floor out of marine plywood, put the tub together, mounted it on the frame that I had already attached the axle to and I was rolling. With everything in hand it's an easy weekend project for 1 person, 2 for an extra set of hands. Once you have a roller then you can attach your roof top tent, awning and do any other outfitting like water tanks, solar, batteries, etc. You can see
my complete build thread on the forum that Dinoot runs to help folks with questions about their products. Good luck with your search.