Keeping that in mind let's take a look at some of the alternatives for the Raspberry Pi Zero boards for under $20.
- Banana Pi BPI M2 Zero. ...
- Banana Pi BPI-M2 Magic (BPi-M2M) ...
- Banana Pi BPI-P2 Maker. ...
- Orange Pi Zero LTS. ...
- Orange Pi i96. ...
- Orange Pi PC. ...
- Orange Pi One & Orange Pi Lite. ...
- NanoPi Neo LTS.