You probably know this ...
I don't think page quantity will have as much of an impact as will the content on these pages. Think of it this way: lots and lots of empty plastic grocery store bags don't weigh very much collectively - it's what you put into the bags that does, LOL. So if they are mostly textural pages, light weight.
BTW - Google likes links ... not only intra website links but also (more so I believe) inter-website links.
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