4 Seconds per day.
That's all you have to manage, on average, to make your film**
4 sec / day = 30 sec / week (more or less... you can cheat a bit)
= 2 minutes / month
= 30 minutes / year (remember cheating: add an extra frame in every shot or so...)
If you want your film done faster, just work at it faster (or have lots of long static shots)
** well, that's about what I manage...