Well, some of us like to have their personal collection of horses specifically dedicated to specific tasks. For example, I use my M.Fox Trotter for whenever I'm doing basically things like: getting a barber cut, racing, traveling long distance, etc. I use my Turkoman for bounty hunting, getting into gun fights, hunting etc. I also own a Ardennes and Buell just because I love my big horses and love to show them off when I'm riding to gamble lol. Needless to say, I want more than 4 because I would like to own the rare horse breeds like the american paint and Tiger striped mustang etc. To each his own, but 4+ horses in a stable won't hurt anyone, but it will be a huge benefit to those (like me) who love to switch off horses constantly. Not to mention have the knowledge of what its like owning other horses.