I don't know. I would not call the women dumb. She just sounds ignorant to me. I have a few friends that bought horses sight unseen before. I think it's a pretty risky thing to do but sometimes you get lucky. I have one friend that bought a warmblood for 8500. It turned out... OK, but she ended up selling it because it wasnt right for her. I have a friend that paid 4500 for a warmblood, it jumped on her and shattered her leg, but she actually still has it and it turned out to be a really nice horse. She's been offered 12k for it. But then I have another friend that bought one for 20k and I won't even discuss that one... bad bad bad.
As for the feet... I've known people that don't even use the farrier through the winter months. Is it adviseable? No, but did it hurt the horse to go 4 months... no... it was a full grown. I don't know what to tell you on this one. The lady made a mistake and bought something she can't handle, it happens. To skip a trimming, is the horse lame? I don't know...
"Be a best friend, tell the truth, and overuse I love you
Go to work, do your best, don't outsmart your common sense
Never let your prayin knees get lazy
And love like crazy"