I think she is an honest to god saint. Which is rarely a bad trait in a horse.
I also think she will need a lot of training to reschool her into lightness.
I don't see a whole lot wrong with her conformation, like all horses, she has a few weaknesses, but I don't see anything that glaringly jumps out at me as a soundness concern. She is FAR too fat, which isn't doing her looks any favors, or her movement... It won't be good for her health either.
The conformation photos of her are all at kind of odd angles, making it harder to see her for what she is.
I think... Before making that drive, I would be making sure to get more extensive video, but if you like her enough to make the drive, I wouldn't write her off.