I have an ancient gooseneck aluminum Featherlite (1999) stock trailer, that after an acid wash, new mats and installation of LED lights, still looks brand new. Honestly, it is the one piece of equipment on the farm that we could not do without.
I do not know if new Featherlites are as well built as this one, and while it is not as heavy duty as say an Eby trailer, it is safe for the horses, cattle and hogs we haul on it.
Ours is 16’ on the floor, and although it is not a stock combo, I can still store things in the neck behind a calf gate.
I have yet to have a horse refuse to get on it, and have even loaded a totally feral horse on it twice. It would be my go to trailer in any emergency.
That being said, if you can find a trailer with the dimensions that work for you, I would say go for it. Right now though, I think prices are rather salty, especially on used trailers. Mine is currently valued at twice what I paid for it in 2011.