While building a flying drone is not a challenge nowadays, gathering all the components for a first prototype and ensuring a reliable operation doesn't seem like an easy assignment. For my first attempt I sourced a few brushless neodymium based motors, and 3D printed a chasis, using the strong Carbon-PET filament:

Then 4 arms the some additional smaller components:

What's left is to get some motors, props, flight controller and a battery for the very minimum configuration.