This concept airplane from DesignQ may look over-the-top, but everything about it is purely practical and doable. It is based on the Avro Business Jet, which is a made-over BAE146 regional jet. The outdoor deck is an imaginative repurposing of the original cargo door and is designed to be deployed or stowed with the push of a button. Beyond the open-air deck, the ABJ features a barbecue station, a fully equipped office space, a marble-floored entryway, a spacious lounge, private sleeping accommodations, and crew quarters. The high wings and engines make it practical to fly the ABJ from rough backcountry airstrips, where jet exhaust can kick up dirt or debris. The rugged craft with the custom interior costs about $6 million, a price that includes exterior livery.