1 - That 50 - 50 split is a killer when I'm doing most of the work. 2 - You talk about taking a month or two and full time working on this project until completion. Trust me when I say I'd love to do that, the issue is I can't just go jump back into the same job as if I didn't ditch everyone here for two months.
Like I said this is probably just not for me, but those are two things you may want to consider for version 1.1.