Approx 6 years ago I purchased a 6x12ft I believe aluminum trailer for hauling my wheeler.
So glad I paid the extra as there is no wood to rot and no steel to rust.
I give it an acid bath every year and she still looks great.
Also very easy to move around by hand as it is so light.
Only issue I have had is with the steel pins that hold the two bi fold sections for the folding back ramp.
I now pull the bolts every season and clean them up with a wire brush and place some anti sieze on them and then it is like new for a season plus.
best money I ever spend for the aLL aluminum trailer plus I purchased the sides for it.
When I purchase this trailer, aluminun was cheaper than it is now so I might assume the price may be quite a bit higher.
I paid $1,300 for the trailer,sides,license and the spare.
Looking at both the taller ramp in the back and the bi fold, I would for sure go with the bi fold.
I have pulled both types many times to North Dakota and the wind drag and loss of mileage is much worse with the taller ramp versus the bi fold that does not stick up so high in the back.
One might think as I did that the taller wire mesh ramp would not be a drag on your mileage but from what I have found, it is for sure.