if u wanna a study ACCA u can study out here in Nepal and can transfer at any time in any country across the globe plus i have heard about BBA degree in KINGS COLLEGE from American University and u may able 2 transfer 2 US.
but i feel if u wanna study acca why 2 spend time studying BBA N there might be some of tuition centers to study ACCA in USA but they are not so popular as KAPLAN FINANCIAL and others of U.K.