There is a limit of 250,000 food consumption that can be sent attacking a castle. so as long as the total food consumption of those 60k troops was under 250,000 it is possible.
Well, seems silly to start all over on this site after getting wiped so if I'm going to start from almost nothing again I might as well do it in a new game and explore a new world. If anyone wants a 70 level fief go to 256 / 1480 it's all yours! Plarium, you're welcome for the idea of the equip able hero, good luck!