Why don't you buy it back? He gets to recoup part of his failed investment and you get your project back. Dedicate 3-7 days to implement what you've learned since that time and set up a passive income source. Would make a hell of a follow-up blog post too.

Sorry, I come off sounding as a cynic from the start. But I have liked the quality and content of Dan's previous posts, and this is not anything personal. With that said - Really? I could find you hundreds of others doing this same exact thing and I wouldn't find that as a reason to qualify them to get my "yeah invest in that dude" senses tingling. I think I see this from a different viewpoint because from my years on hn it seems as most of the readers are blind to the other side of the startup world - the one where people focus on building products for 1) money or 2) flip. There's a whole ecosystem out there full of these small, medium, large, business that are bought and sold everyday.