Should I get a thoroughbred??? Opinions please!!?

That's such a tempting situation, but you've definitely got valid concerns... Personally, I'd be most worried about a sudden emergency. If your parents wouldn't help out, and you don't have a bunch of money stashed away, you would be stuck in a really bad situation. Have you taken the cost of grain and hay into account too? If you don't already have one, you'd probably want to get a job for the vet, farrier, feed, potential board if you chose the $40-60 a month (what a find, closest barn to me is $1,000), and even save up for potential emergency vet bills... Then a job, school, and regular horse duties seems like a LOT to handle. It's definitely tempting, and maybe you are an amazingly disciplined person with great time management skills, but from an outside view that seems like a pretty challenging situation.