Yeah, the tapes say it's better to allow a day between tapes, but recommend at least a half hour. However, it definitely isn't necessary. However, many of us haven't got enough free time to do more than one a day anyways.
I would think that 3 or 4 days would be a good pace. Off the top of my head, I think a schedule like 1-4, 5-6, 7, 8&7.
However, that's from hind sight. For people that haven't haunted the forum before buying the system. You should probably go slower. There is some belief system being built, and that can't be rushed.
The only one I don't think it's worth worrying about is tape 1. Just go onto #2 as soon as your finished.
The above opinions are those of the poster and not those of LSC. 
Iam2 