I don't think I would ever make a decision without seeing the horse first. But let me make some observations.

She seems to genuinly like the animal. And his body language in the pictures is pretty placid. However she is clearly intimidated by him. Look at HER body language. I am not sure if she bit off more than she could chew when she bought him OR if there is more going on with him. Take a good look at how she is holding his hoof -- she seems terrified of him landing that hoof on her own foot. If that were the only pic, I might be inclined to say it was for the camera, but the other shots show her timidity as well.

Oh, and 16.2 is not that HUGE! (The Andalusian I want to buy is 16.2!) She is a little thing used to ponies, so huge is her perception.

We had a couple of draft horses at the ranch where I rode as a kid, and they seemed to fall into two different catagories: Solid as a rock. Or spooked at the slightest provocation. There didn't seem to be any middle ground (of course we're only talking about 6 or 7 horses!)

If you can handle and deal with a spooky horse, then it's not a huge problem. But horses that spook easily always seem to spook easily. Sure you can desensitize them, but you cannot take away the hyper-awareness if that is in their core personality. I hope that makes sense, as it could be important here.

I would try not to be too impatient. Get your trainer involved if you can, and take a road trip up to check him out. That is the ONLY way you are going to be sure. And when you go, watch the body language of people around him. Are they preparing for him to misbehave or are they just intimidated by a large horse! Horses have their tells... so do people!