I’m planning on making my sister a magic mirror as a house warming gift, and have been watching videos and reading through the forums to get an understanding of what’s involved. I was hoping give it touch screen but that seemed out of my budget. Then I realized I could use a small touch screen for simple stuff like volume, a keyboard, or to pause and play video, and use a 20" monitor for the main display.

Is this something that has been done before?
If so point me in that direction.
If not, how hard would it be to do?

I have no previous experience with Magic Mirror, Linux. or RPI. So if there is anything out there that is relatively simple, or even better, in a completed state, then awesome. If not, then I’ll go sans touch screen for the time being, until I get a better grasp of this whole process.

Thanks in advance,