Check out Sure-Trac trailers. I bought an 18' w/radials, spare, removable fender, diamond plate bed, 7k jack and rated for 10k. The trailer is powder coated, frame constructed with tubing, excellent welds, all led lighting, sealed harness, etc. I loaded my tractor and additional attachments at very close to the trailer weight limit and it tows like a dream. It's almost like you don't have a trailer hooked up.
The pricing iis very competitive and I was all in at a little over 3.5k. No, I don't work for them or have any affiliation. I just have never seen anything about these awesome trailers on tbn.
FWIW, I purchased mine from 'The Hitchman' in Maryland. Great place with good, friendly, honest staff.