Planning on purchasing a snow blower for my parents this Christmas. For those with experience using them during Iowa winters, would a single-stage blower be adequate or should I just go ahead with a two-stage? Residential neighborhood in Des Moines, fairly standard single car driveway (maybe 60 feet long) and sidewalk to clear. Open to any recommendations or brands to avoid, I was thinking of getting a gasoline powered blower with an electric start. Thanks in advance.