My horse is a cribber, and most likely has ulcers: besides cribbing, he's VERY girthy, although he's not a hard keeper. I've only had him for about 4 months, but having a cribbber/horse with ulcers is certainly a different set of challenges.
When I bought my horse, the seller told me that he "might" crib "a little." Well, he cribbed on everything. All the time. He's gotten better about it since I got him, but he will still crib without his collar on. This is something that I'm OK with. However, he's still very girthy, and this is something that I'm still working to fix. I started out with U-gard and ProBios; he did improve on it, but I'm not sure if that's because of the supplement or just because he settled in to his new home. Just recently, I replaced those with Succeed, which is a bit pricey, but I'll stick with it if it seems to be working after 60 days on it. I'm hoping not to have to resort to omeprazole paste- which runs $30/day for 30 days and doesn't necessarily cure ulcers permanently. Despite all this, I would definitely buy him again. I spent 5 months looking for my horse, and I didn't see any other horse that I liked even half as much as him, and I looked at a LOT of horses.
Take a serious look at your finances and determine if you can afford to keep a horse that is a hard keeper and might need expensive supplements. Consider whether you'd be able to afford $900 for omeprazole if that's what's needed to cure her ulcers. A lot of people have a very hard time affording to keep their horses while they're in college, so think ahead to how you'll pay for all this while you're in school. If you don't think you'll be able to afford it, then don't even go look at the horse.
However, if that doesn't put you off, then absolutely go look at the horse and don't write her off just because she's a cribber. Ask the seller what she's being fed currently to get an idea of how much food she'll need (it can easily be 2x as much for a hard keeper TB, cribber or not!)