That's a hard question! I would probably get a paint pony because I prefer ponies, and paint ones are just adorable! I love pony attitudes! I would also spoil my pony with all sorts of cute tack and stuff. Maybe i'd get some new riding clothes for me too! I hope I will win the lottery someday...
I would use the money to buy a really, really nice warmblood, a huge draft (I really want to rescue a PMU baby someday), and a mini.
And then I would end up going to auction and buying some very, very sad looking oldies that nobody wants and giving them a place to retire.
I would buy Neela.
Then I would buy Mountain, possibly Playboy back.
I would buy a 100 acres in Kentucky (or somewhere), built a very nice barn.
Save some slaughter horses.
Then built a house next to the massive, wonderful barn.
Then if I have any money left over, buy a Lamborghini.