Plutarch as unit study?

I know unit studies aren’t CM, but we’ve been using them in a CM way this year and it’s going really well for my kids to immerse themselves in one topic. So far we’ve done astronomy, are finishing up Australia, and will do our first Shakespeare study next. It’s not a true unit study as we aren’t including other subjects (except as they come up naturally) but rather a focus on one science/history/geography topic at a time.

I am starting to look at my units for next school year and wondering where Plutarch fits in. I will have a 6th grader, 3rd grader, 1st grader, 3yo and newborn. It is easiest to me to make Plutarch a “unit” of a month or so and read a bit every day like we’ve done with our other units. However, I have concerns about the reading being to heavy to “digest” on a daily basis, and I have concerns about everyone but my oldest getting lost and not getting anything out of it.

I know it would be great to do once a week throughout the year instead, but I’m not sure how that fits in. We currently don’t do our unit on THursdays and do nature study instead. If I took another day away for Plutarch weekly, it would affect the flow I think. Or would it be better to just wait on Plutarch? We got about halfway through Publicola late in 2017 before stopping, and it was going “ok” to do it a paragraph or 2 daily. My kids haven’t done well historically with once a week readings. Help please!