I have finished soldering the device, and everything appears to work! This was my first time ever hand-soldering a QFN with a hot-air tool, but everything went smoothly. See below and in this project's gallery for some decent pictures of the final result, and for a video of a very basic test. There are many things that could be improved, like capacitor, mosfet, and header placement. However, this is still perfectly fine for my current needs.