I was thinking a tow option also. Many car companies offer a tow option upgrade. I was thinking 5,000lbs, thats what my old 2000 Frontier could tow. I didn't realize horse trailers weigh so much. I don't expect the Model X to tow what a half ton truck can but at least comparable to a quarter ton (Tacoma or Ford Ranger). Not sure what trucks can tow these days but growing up it seemed all those small trucks were maxing out at 5,000lbs tow rating.
Wishful thinking on my part. Figure average horse weighs 1,500-2,000# and trailer another 2,500+, and 'gear' ( I am NOT the horse person in my family....dang horses..sorry Nigel:wink. But it would be nice. Iagree that it would be great to tow 3,000+ though as it would satsify many 'non horse' people