Setting up a Raspberry Pi to serve as development computer and media centre

Connection diagram

I wanted to use my Raspberry Pi for coding projects; that's what the Pi was designed for, and it allows to unload that from the main computer. A clean separation of concerns.

But then I also wanted to use it as a media centre, keeping the media on a network drive. What I don't want is to rearrange it every time I switch from one configuration to the other, but just turn it off, swap the SD card, and turn it on again.

This is what I came up with.