This is my touchscreen panel if you want to take a look. I am using the WaveShare 7 inch screen which uses USB input instead of GPIO pins. The touch function like a touchscreen on top of a mouse pointer. It is probably not quite as good as an official RPi screen but it still works well. I can post more pictures if you like. I craft the frame myself but you can buy a case for it too.
volumio-lcd-panel-with-rpi3-t9011.html
I use a RPi 3 because the screen uses X11 and therefore requires more processing power to drive. A RPi zero will make it extremely slow in response. My experience with RPi zero is that it gets unresponsive with Audio Resampling set to Very High so if you add a screen to then it will probably unusable.