(23,000 pages)/(7.5 pages / day) = ~3,000 days or a bit over 8 years.
Or, perhaps this could be a business -- host a Harvard Classics Resort where everything is taken care of. You supply the ideal environment for reading (whatever that may be), including a small community to discuss the books with.
You could teach a few speed-reading and self-study courses for an additional cost.
St John's College has this angle covered.
In a lot of ways it's much like any other college or university in that it can be gamed and you can graduate without putting forth a great deal of effort. They do have interesting mechanisms to weed out those who truly don't belong there (Don Rags, enabling), but if you're willing to read and write you can make it through four years.
It's a great place to get a liberal arts degree if you take on the curriculum with the intention of absorbing the material and building the foundation that they're laying out for you. I've been told that post-graduation it is often necessary to complete undergrad credits elsewhere before most grad schools will look at you - not sure how accurate that is.
It's an extremely romantic idea. I'm satisfied with my current education, but I still find myself envious of the environment they are at least trying to create and what that has to offer.
Not much attraction for a kid wanting a job ticket.
In the case of a person attending this university just because their parents made them -- I feel very sorry for both the parents and the students for the waste of money and lost hours of amazing opportunity.
IMO, if a book is meant to be speed-read, then it's not a classic of literature. A classic should be tasted word by word, slowly. And reflected upon.