I'd suggest videoing the whole thing. Then do a post-production edit, and in doing so you need to remove all the boring parts. Then you can see how much time you still have. Then you can better figure out how much you still want to cut so that it's not too long. Keep in mind, 6am to 2am (the playable time) takes a minimum of 14 minutes 20 seconds of real time to pass. You don't have to stay up to 2am (and in fact getting to be at or just before midnight is the way to ensure you always wake up with max energy) so that can shorten that time, but any interaction that pauses time or any time you choose to pause yourself, that extends that time too. I'd say that if you're working quick and not pausing, you're looking at about 15 to 20 minutes of real time to play each day. That means you're looking at 25 to 33.3 hours of footage that you'll be working with. Try not to keep too much of it.