I want to study at an Ivy League University? Is it possible if im from the UK and not the wealthy?

You might be eligible for a scholarship, but quit trying to build a CV! The admissions people can tell you're just building a CV, all the applicants to Ivy League schools are doing that. Just really put a lot of effort into something you really care about and write some stellar essays for the admissions process. Honestly though, make sure you apply to some good cheaper schools as well because Ivy League schools are very competitive.