80 euro equivalent seems to provide a 2014 Mac Mini with 4GiB of RAM and half a TB of storage over here. Doesn't come with a touch screen, though, and carrying around a PSU for the thing is also a massive pain. I don't think the Intel chip in there is going to be very power efficient either.
2014 mac mini doesn't have an external power supply, it just takes a standard figure-8 ac cord directly.