Creating Individual Blogs vs. Co-Authoring One Blog

I am trying to decide if I should create sixty blogs for my students to use or have them co-author one blog. I guess I need to consider the pros and cons of each.

Pros of each student having their own blogs:
1. Students get to change themes to reflect their personality.
2. Students can add widgets to their blog they choose.
3. Students feel pride when their cluster map shows people visiting.
4. Students can continue to use their blog after they move to 6th grade.

Cons of each student having their own blogs:
1. Set up time is huge.
2. I have to spend time checking students blogs to make sure the widgets are
appropriate.
3. Some students never change anything on their blogs.
4. Most of last years students have not posted on their blogs since my last assignment.
5. The way I have our blog aggregator set up, when a student changes a post the changes do not get updated on the aggregated blog.

Pros of having a co-authored blog:
1. Set up time is much smaller.
2. When a student modifies a post, it automatically updates the aggregated blog.
3. I don't need to spend time showing students how to change things or how to keep
their blog safe.

Unknowns of a co-authored blog.
1. Don't know how many people can be creating new posts on the blog at one time.

I think I will try to set up the co-authored blog and see how it works. The time saving by itself makes it very appealing. I can always show students that want to create their own blog how to do it without having to spend important instruction time on it.