When we decided to take our embroidery business 'on the road' we sold our stick and brick and 98 RoadTrek 'B' and bought a Jayco Seneca Class C. One reason for the Class C is that my DW will drive the 38' C but not a 30' Class A. Go figure...
I think that most folks don't buy a Class C is due to the lack of outside storage. Since there is no 'basement' there is little to no storage.
Since we haul a 24' car hauler with Pontiac Solstice, Goldwing and 2 embroidery machines (and equipment), we needed the biggest diesel engine we could find. And since we live it it full time, we needed the most comfort we could find. The Seneca, with 3 slides, a 340hp diesel and a good size genset makes a good home.
Lew