The Safari Trek with a inline 4 Isuzu engine only has a 90" total exterior width. I guess that is the skinny class A out there. It was a base model for Safari, and they only made them a few years. They would tend to get great mileage, and the small engine powered the Isuzu 15,000 pound delivery trucks, with a average 200,000 miles on them before considering retirement.
If you are looking for something new, then the inline 5 diesel Mercedes based motorhomes are fairly skinny, shorter than average, and overall small inside. They have some great designs to take the most advantage of the space that they do have. They are fairly expensive though.
Many have downsized from a DP to a smaller class C without the cabover section. The owners no longer want to tow a car behind them (but could) and want something that stops on a dime, because their reaction times are not what they used to be. The Ford E-450 chassis motorhomes have lots of inside space, while being much smaller than a normal motorhome on the outside. With a larger slide, they can expand once at the campground.
Good luck on your quest to find the correct motorhome.
Fred.
Money can't buy happiness but somehow it's more comfortable to cry in a
Porsche or Country Coach!
If there's a WILL, I want to be in it!
I havn't been everywhere, but it's on my list.
Kangen.com Alkaline waterEscapees.com
