Its quite easy to selfhost. They now even provide an installer script that helps with setup and updates. But it consists of multiple service to host the full stack. A bit more than you would need to run a fully featured Synapse(PostgreSQL, Livekit, etc.). But still not as heavy on resources as Synapse, i guess mainly because matrixs federation needs a lot of resources.
I used 1NiteTent once. Was a nice experience, but is limited mostly to germany and has inactive spots.
My layout is inspired by the Neo layout(QWERTY version). So i have my arrow keys setup like they are on layer 4 of the neo layout. Which means arrow keys on "esdf", home on "a" and end on "g". The addition of the home and end keys next to the arrow keys feels very natural.
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An absolute bonus of using neo inspired layers, is that you can easily have those on "traditional" keyboards as well. Simply set the keyboard layout to the "neo_qwerty" variant of the "layout" on linux for example and enjoy proper layers on your integrated laptop keyboard.
Ooooh, i really like the magsafe idea. Seems like a more versatile version of the tenting puck.