Everything else doesn't matter.
x200
Raspberry Pi with chink screen and a battery pack.
>>60078031
X60
https://www.amazon.com/StarTech-Gigabit-Ethernet-Network-Adapter/dp/B0095EFXMC/ref=sr_1_2?s=electronics&ie=UTF8&qid=1493197650&sr=1-2&keywords=USB+3.0+to+Gigabit+Ethernet+NIC
>>60078031
2012 macbook pro
Any old netbook will have one
But go with these:
>>60078673
>>60078050
>>60078031
Asus EEEPC stuff
or Samsung equivalent
>>60078703
>muh dongles
I'm not OP but the ability to run Arch and have functioning WiFi is required. Thank you for your time
>>60078050
seconded. If you are picky, get the x200s version with 1440x900 screen
>>60078031
Literally a USB 3 Ethernet adapter
Its that easy
>>60078031
Most of them are only 10/100 so you're wasting your time.
Why not get USB to Ethernet