There are some other advantages to having a narrow trailer and that is parking regulations. For instance in Seattle I can park my Campster
on residential streets. The code says no vehicles on residential streets overnight if they are wider than 80". If needed I can then boondock in the city in a nice safe residential neighborhood. But if I had a wider RV then if I wanted to park it overnight I would either have to take it onto private property or park in industrial zoned areas.
So before you decide figure out where you might want to be parking it. If you are going to park along curbs remember it can be somewhat difficult to fit into a space with a wide trailer. There are always compromises to be made for decisions about what works best. But many people stay in RV parks or campgrounds so width is not an issue for overnight stays.