Add funding info

FUNDING.yml

@@ -1 +1,2 @@
 ko_fi: polpo
+custom: "https://paypal.me/ianpolpo"

README.md

@@ -16,6 +16,10 @@ Want to make your own beta PicoGUS? See the [build guide](https://github.com/pol
 
 Have a PicoGUS and want to use it? See the [configuring and using your PicoGUS guide](https://github.com/polpo/picogus/wiki/Configuring-and-using-your-PicoGUS).
 
+Want to support PicoGUS? I have a limited number of machines to test PicoGUS in and donating either money or motherboards would be greatly appreciated and help increase the compatibility of PicoGUS.
+
+You can donate via [PayPal](https://paypal.me/ianpolpo) or Ko-Fi: [![ko-fi](https://ko-fi.com/img/githubbutton_sm.svg)](https://ko-fi.com/U7U6IZTCB)
+
 ![PicoGUS v1.1 beta PCB](https://user-images.githubusercontent.com/1544908/215666529-fc694b8f-aec3-4679-87df-b53d0c406c99.jpg)
 
 Looking for the original project, using Raspberry Pi 3/4? See the [pigus repo](https://github.com/polpo/pigus).