Add link to funding section in README.

README.md

@@ -61,4 +61,10 @@ I would like to thank [Leonard Salewski](https://twitter.com/L_Salewski) and [Jo
 
 ## Funding
 
-TODO
+This project is mostly a solo project and I love to work on it.
+
+However, it is both a large time commitment and requires compute resources for training models.
+
+If you think this project is valuable and want to express your gratitute, then please feel free to buy me a virtual coffee [here](https://ko-fi.com/martin_l) :-).
+
+Thanks!!