Cargo trailers are build regionally, while you choose not to disclosure your location?
Wells Cargo are very expensive, while when I needed trailer for moving- I found a dealer in Las Vegas, who was selling trailer made in Georgia.
I actually went to the Georgia plant on my travels and it is huge manufacturer of affordable trailers.
I choose 16' V-nose for about $3000 as that size fits cars inside, what is always valuable option. Almost all bigger cargo trailers are wide-bodies.
Had to redo some screws on it, but I consider it good value.
The trailer tracks behind my dually with no issue and I never used WD bars.
Generally short, single axle trailers are most prone to fishtailing.