Bought the wrong motorhome!!!

I've had narrow and wide body coaches. I've had shorter and longer coaches. After putting several thousand miles on a coach, I personally found very little difference in driving them, or in where I could go, because of size. Obviously a smaller coach in length(width is a non issue) can fit into more areas(like when fueling) than a longer coach, but in most cases, the length can easily be dealt with.
The only problem that is difficult to deal with is the amount of space that you have to store the coach on your own property. If you only have X amount of space, that can be a problem.