>"without spending thousands of dollars"
Sin gastar miles de dolares

>"world champion"
Campeon mundial

>"an event at the World Championships in Montreal"
Un evento del Campeonato Mundial a celebrarse en Montreal

>muchichimas (????) gracias
It's muchisimas.

But beware, I just translated the text you gave me, I don't guarantee that you'll be able to drop them in whatever it is you're translating. No accents here cause I'm lazy and haven;t set up the keymap.