Width of trailer is something I set to the vehicle I plan to use for towing. Sure, anything can be towed if legal, but having a trailer the width of the tow vehicle makes for easy towing in my opinion.
If the truck fits, the trailer fits. No skinny trailer hiding behind a dually making backups difficult. No skinny vehicle behind a big huge box trying to see around it even with mirror extensions you wind up with a lot of that trailer catching wind.
I also learned with the jeep and my ancient utility trailer I got for a few hundred bucks that if running over some boards for a home made bridge having the trailer track in the jeep ruts means the trailer tires go right over the bridge. Yes it could have been managed anyway, tiny ditch of rain water and mostly avoiding mud. But having it track right in with the wrangler was super nice and easy.
Now that I have a wrangler and a short bed half ton I notice when a big box trailer is catching a lot of wind. Had a dually and it never cared what I hooked to it, jeep grand cherokee knew it was there but did not really care much since I never towed near its limit.
Depending on where you park and how you do things you might find a single axle enclosed trailer with a wheel on the tongue jack is something you can easily move around empty, this is usually on flat concrete. Get into the dual axles and they might go forwards and backwards ok but I don't find them as easy to turn.
At a friend's place one year the truck had issues so we unhooked the loaded trailer and just pushed it over to his truck and hooked it to his truck. Trailer was loaded right, single axle with a good tongue jack with wheel in place and it rolled easy.
Truck got towed and fixed.