That pretty much defines 'art' I think. The artist is compelled to see the vision through, it isn't about the money or the time or the cost. I am quite impressed he stuck it through.
A long time ago (1983 to be precise) I started rewriting Empire, a curses based turn based strategy game (Hi Walter!) because I was convinced I could make it so much better and I had spent a lot of hours playing it. When I was at Intel working on a high end graphics chip I joked with one of the design engineers that it would be cool if you could see little armies fighting but we both agreed there probably wouldn't be enough CPU / graphics capability to do that in real time, at least not in our lifetime :-).
While I never finished my efforts (-1 for me I guess) I learned so much along the way, I bought Dunnigan's excellent 'How to Make War' book which was the bible for wargames at the time (and to some extent still is) and tackled path finding algorithms, and automated forces deployment, and strategic evaluation with limited vision, and all sorts of really interesting problems/puzzles that each offered up a ton of interesting insight. Bottom line it wasn't a waste of time for me, even though I have nothing to show for it.
I love that Adam stuck with it and got it done. Very inspiring.