After the expenses, its still hard work. There is no days off, and its way more dirty that one would guess. You smell constantly like horse poop and leather.
All you clother will be stained and your legs and feet will be sore and get blisters. At least, untill you get used to it. Invest in good boots, not just riding ones, and gloves.
That being said, they are the most fun I've ever had. As an adult or a kid. They will love you for you, they don't care you smell like poop, or that you need to shave.
Oh, and I never met a horse person who doesnt love the smell of leather.