The B+s and Cs under 25 ft. in length are actually cheaper than Bs for the most part. I had a discussion with a lady at the RV show who was looking to downsize from a small B+/C (forget what she had). Her downsizing was not because of length but because of width and driveability. She was dreading the shoulderless roads she was encountering in New England and most of the east. We here in Minnesota are kind of spoiled with most roads having shoulders simply to push the snow aside and find it kind of shocking from Indiana on east.
Any thing over 20 foot technically might not fit in a standard parking stall but anything over 7 feet in width definitely should not be parking in side by side stalls or curbs. You can easily park up against curb and grass with a van over 20 foot with overhang but if you park with a wide B+/C you kill the stalls next to you on both sides and if you are over 20 feet you can kill 4 stalls let alone trying to find a place to park other than a Walmart or Target like parking lots way out. Also the turning radius gets more difficult despite the capable diameter. This is a subject I am intimately familiar with being directly involved in the design of over 1,000 Target Stores, the Mall of America parking ramps, and several restaurants. Narrow is more important than length.
The Great West Legend EX is still shorter than our Legend and our former Pleasure-way Plateau with a hitch cargo carrier or bike racks that many B owners resort to. The storage, B wise, is humongous in that Legend EX. It has 55 cubic feet of added storage and the largest hitch cargo carrier is about 20 cubic feet. Most are around 12 to 15 cubic feet. I look at it this way. I would still have no fear of driving through the Needles Highway in the South Dakota Black Hills.