The author's tone when they discuss the cost of the project is self-deprecating. They know it would have been simpler to just buy one.
But also, the author has given the community a great gift, both directly (the blog post and the project!) and indirectly (the idea: what else can be implemented in similar ways).
Author here: Thank you, this is one of the nicest things anyone has ever said about my work.
I achieved two goals today: a front page post on hackernews and for being recognized for my work; or more accurately, for being very good at using AI ;)
But also, the author has given the community a great gift, both directly (the blog post and the project!) and indirectly (the idea: what else can be implemented in similar ways).