I have a 16' Ultimate Dump, bumper pull. GVWR is 15,400 with 7k axles.
I use it for firewood deliveries, and my son has used it for renting equipment for some home projects.
Lots of tire scrub in not even that tight of spot. I've left tire marks on several driveways, and grooved a few decretive white stone, and gravel ones. I've wondered more than once if the tire would come off the rim on a couple concrete driveways.
I considered 8k axles because of the heavier tires/brakes. However, the tire upgrade was just a heavier China tire, and I had read to stay away from oil bath hubs due to leaky seals. I figured backing in tight spots would not help the seals, and I don't want to get oil on customers driveways. 8k axles/tires/brakes were a $2k option. Gooseneck was about $1,800 at the time. However if your not in tight spots, oil bath hubs would probably not be a problem.
Low Pro models: Mine is 82" wide inside the high sided box. Very tight to tie stuff down. Mini skid might not be too bad. I do however love the hydraulic tailgate for loading, and especially unloading equipment. And the mesh cover is on a hoop, quick and easy, I use it every time, and that's the point.
I recently saw "Dirt Monkey's" YouTube on a flex neck gooseneck trailer at a trailer trade show. He mentioned a video coming up on the Ultimate Dump.
I wanted 16' and high sides. I was going to order a Sure Track and the dealer couldn't give me a price due to (Covid) slowdowns, steel pricing and transportation cost increases six months out. I ordered the Ultimate Dump, no options, and it came fully loaded. The hydraulic jack was something I did not need, but was standard on the trailer. I love it now. I would have liked the telescopic hoist, not an option because of jack location. However, the jack being at the back of the tongue/front of box, means the tongue area is wide open, no tailgate interference. I think Diamond C might be better designed with channel frame vs box tube frame, and telescopic hoist option. Have not had a problem with scissor hoist however.
My trailer is a year old. Paint is powder coat. I've kept the chips touched up, but have one spot on inside of tailgate that began to peal. I sprayed it with WD 40.
I wish I had ordered the gooseneck version as there is 850 pounds tongue weight empty. I've never backed a gooseneck, run a tonneau cover, and the optional cost consideration overrode that choice at the time. I just have to be mindful of where the load is. I have weighed two cord loads, with combined gvw of 20,500. It's a good trailer for my use. Quite noisy sometimes, as it has fold down sides, which I've yet to drop down.
Edit: Another axle consideration. I found what I could on YouTube. Some guys running under cdl bought trailers optioned up. Blew brakes, and during the repair found the axle option didn't happen, just wheel and tires. Bought 8k brake parts and they didn't fit, 7k did.
Also these guys found on other trailers they had with 8k axles, that parts were hard to get, and very expensive. 7k parts are available most anywhere. Obviously that will change eventually, but you might want to order and stock them if your running a trailer for business.