Instead of roaching, or doing a ton of hunter braids, what about doing some plait style braids?
I have a video posted on our Top Knot Braids site on plaiting, doesn’t take longer then 20 mins so hopefully your hands won’t get too numb!!!
http://topknothorsebraids.blogspot.com/2007/05/horse-braiding-tip-6-european-style.html