Steel frame/ribbed cargo trailers go up in weight fast as they get longer and wider. So called seven wides have tires that are the legal width (8 ft. 6 in.) for any vehicle on the road. Six wides have the tires at 8 ft. (This is why I like inboard wheels, not outboard, but no cargo trailers have them except the 8 wides.) Watch your weight. Go for the smallest trailer that just barely will meet your needs. You'll have buyer's remorse initially, and then you'll get in some tight places with it and will wish it was shorter and narrower.
Steel ribs will allow you to mount a Yucatan hammock and use it without bending the wall in like it probably would on an aluminum-ribbed Featherlite, Aluma or Worthington. I'd still put a hard wood 2x4 across the ribs and then mount a SS eye bolt with double fender washers to the 2x4 to spread out the load of your body weight on the wall (even if you only weigh 98 pounds.)
