I kind of agree with Geon. I mean, the warhorse does cost more than 30k, which is alot for ANY item in this game, really, yet what does one gain from this? A slow horse that's unable to take THAT much damage? Generally, my large warhorse can take 6 or so arrows before going down, and while that might seem like alot realistically, it actually isn''t cRPG wise. There are many archers, and they shoot many arrows.
However the warhorses are the weakest of the tank-horses, and the cheapest, by comparison to the high tier tank-horses. I made the mistake of purchasing one, largely because I thought the other tank-horses were ugly as fuck. Still, I think, perhaps, all the tank-horses should get a bit moar armor or HP. They are AMAZINGLY expensive, and slow moving targets; and this is in a game where cavalry fights more like sneaky ninjas and isn't really designed to be tankish. My experience with the beasts is limited however.