I worked on and drove school buses for many years and found that they were big, heavy and not real comfortable to drive on long trips with MPG's from 5 on gasoline engines to 13 on the best auto trans diesels. Tires, regular maintenance as well as daily use kept them in really good condition as long as they were on paved roads operated by state regulated school systems. Once they were sold, usually to church or other large groups that wasn't the case and sitting caused things like tires, breaks and hoses to go bad and usually they weren't maintained or repaired properly. Because they had heavy duty drive trains when they broke they were more costly to repair. If you are able to drive and maintain one, afford the oil, fuel,tires and travel to new locations 25 miles away every few days they would be okay but with a curved roof not as much space as a box truck.