I don't think I could afford it. I couldn't possibly be on a bus all day. There are two answers to this concern. First if you are on a tour that is based around traveling long distances, then modern touring coaches are luxuriously comfortable and afford each passenger panoramic views far superior to those from private cars. Tours are carefully planned to include frequent sightseeing and refreshment stops.
Many tours also feature ferry crossings, cruises, plane flights or train rides.
Second, some tours are not based around the motor coach at all. Your primary mode of transportation might be a bicycle, a four-wheel drive vehicle, an elephant, your own two feet or many other modes of transportation. I don't have time to take a 20-day vacation. It doesn't take a month to enjoy touring. Tours range from 7 to 31 days, and most are between 10 and 17 days.