MS Access Database Design

Hi, I need a database designed in MS Access. It will have around 300,000 records when complete. The major job that it needs to do is to search on specific queries, and then save the result in an excel sheet. It will probably have one main table and a few related tables. The main idea is that although I know how to work with Access, people who are going to use this don't know anything about Access so we need to create a front that covers the access look and feel and instead presents them with a simple form/forms, ... Anyways, I would like to know how you would approach this, if we can agree on a set fee or it should be hourly, ... Send me any questions that you have but I need to get started on this immediately so am selecting the person to give this to. Thanks. Regards, Emad