Hey, I read each of your responses, and thanks for the info. Seeing the different approaches to this common problem is very helpful. Also hearing that it's OK to lose interest is good, too. I actually started something else and now also want to go back to working on the original game as well, which is great to see. I guess avoiding burnout is the primary thing, and is important to do, regardless of how you do it (if the game won't get done unless you take a week off every week, then do it if you want to finish it).
Anyway, thanks, again!