It's about 45 or 50 for a mane, with about 30 - 40 braids in it, and 25-30 for a tail. Many braiders charge an expense fee, which can either be per horse, or like a travel charge for coming out for just one horse. Many also give a small discount for a mane and tail combo, which can be anywhere from 65 -75. It's a hard business to get into, and you have to be willing to travel. It can be nice pocket change if you go with your barn to a show and do it for them, that way it's like a working vacation. Even if you think you can braid, you can't, everyone thinks they can braid until they really learn. If you are intereseted, practice, because no one is going to let you leave in ugly braids, and until you are good, ugly braids just get uglier as the night goes on and a horse rubs them or sleeps in them. You are up all night, and it is mighty cold some nights if you really persue it as a career. It's not something you can just walk into, you would need to talk to a local braider and prove you are serious, then they might take some time and give you a horse to practice on while they are working, that way they can look over your work. Learning how to do a decent job can help offset show costs, or horse expenses, without stepping on anyone's teritory, but people get very possesive of their barns.
Troubled TB ~"A thorn by any other name will prick just as deep." @-'--,---