If this mare is a REGISTERED NSH(many saddlebred/arabs aren't because their breeders don't want to spend the extra few hundred to register their foals) then she could be bred to a saddlebred or NSH stallion to get a NSH registerable foal. These foals are normally marketable the best if they are able to trot in an english(saddleseat) frame, and often get lost or separated from their papers if they can't because they can't be registered and shown as a 1/2 arab and you lose much of the market by that. Your mare does not appear to be an english(again- and am talking about a saddleseat type horse) and would most likely not have the english upright type foal even bred to a very fancy SB stallion. If you were to breed her to an arabian, you would have a registerable half-arab that would fit a better market niche- but unfortunately the current market is SO terrible, I really wouldn't recommend breeding to anything.