Luckily, the general rule is that you do not need a special license to drive/tow an RV weighing less than 26,000 pounds or less than 40 feet. Even better, most RVs fall under that weight and length, especially RVs that you’d be potentially renting.
Class B motorhomes are more commonly known as van campers because these RVs are built on a van chassis with a raised roof. Class Bs are typically the smallest drivable RV but still have a bathroom, convertible bed, and basic kitchen necessities.
Like anything, the rental cost will depend on size, amenities, and time of year/location, as well as whether you’re renting from a private party or company.