Poor horse! Why were they breeding her if she's so valueless/unloved?
Just using her for her uterus? That makes me very sad :(
I have pet insurance on my dog and have been MORE than happy with it. When I rescued my horse I thought I should get something similar for him but what I've learned researching online and talking to horse people is that the existing horse "health" insurance plans (at least where I live) aren't worth the premiums and can actually drop your horse after something happens!
For instance, my mom's horse was dropped from the insurance after he ate a bike seat. Didn't need vet care or anything but they had a vet come out to check him just in case. Bam, dropped!
The other thing is the pre-existing conditions that you and I are both stuck with with our horses. Even if we could get them insured they wouldn't cover the issues they already have.
Before I decided to adopt my boy I thought about best and worst case scenarios. If I could get him sound, what would my plans be for him and would he be the right horse for it? For instance, he has funky confirmation in his hind legs so I could never show him, not that I want to. If he'll never be sound, worse case scenario, and can never be ridden, what will I do and at what point will we (me/vet/farrier) make that distinction.
If you have the time and money and room for a YOUNG horse who will live a long while and you may never be able to ride then go for it and save that lovely girl!