<p>If it is possible (as ElizabethHouston points out) to get a good approximation of what the FA offer will be before committing to an ED application, then there should be no need to back out of an ED acceptance unless there is an unanticipated change in family finances. In that case, an appeal should be possible.</p>
<p>Also note that the OP is an international applicant, so a State U might not be any cheaper (out-of-state rates and little or no FA) and I doubt that many international students would travel thousands of miles to attend a Community College. As Elizabeth also says, schools sometimes share lists of those accepted in the ED round and comparable institutions may choose not to offer admission to those on the list. Hence, backing out of an ED acceptance could leave an international student with few alternatives.</p>