Custom X-Quadcopter Design Blueprint

I need a complete design package for a small X-configuration quadcopter whose primary role is carrying interchangeable sensors or other light payloads while streaming video through a built-in lightweight FPV camera... (Budget: €8 - €30 EUR, Jobs: 3D CAD, 3D Modelling, 3D Printing, Aerospace Engineering, CAD/CAM, Mechanical Engineering, Product Design, Solidworks)