Client App for Proprietary Company

Hello, I need an app for our proprietary system used at our company. This app would allow users of our system to run reports, stream audio, and playback recordings, and perform general functions on our app. Our system is built on a Microsoft mssql database, with a Linux SAN for the recordings. This will require a built in VPN connection, approximately 20 or 30 screens depending on the users request. Support for robust and flexible multiple security models, graphs, charts and embedded images. I am just looking for high level estimates and timeframe at this point. I will require this run on an ipod and ipad.