The whole thing sounds fishy. Why in the world would they breed her to foal so late in the year. Would put her foal at a HUGE disadvantage in racing. If I was interested in her, I'd take her right away because I think she needs better looking after than what she is getting. It's really hard to say for sure from the photos, but I think she needs some weight.
BTW, why are you looking at another horse, when you don't have a place for your first one that you are happy with?