Along with the number of different plugins used, the other key factor that can unpleasantly increase the time required for managing your set of blogs is represented by templates.
A large number of blog templates is available on the internet to choose from, also for free.
A wisely selected template/theme can do a lot to boost your Google AdSense clickthrough.
However, templates are now and then updated by their authors and they are therefore to be periodically re-installed into your blogs.
Even though installing them is in WordPress a practically automatic task, it does take some time and attention.
Particularly so if you had modified the previously used template versions, maybe for inserting into them the Google AdSense scripts.
This being the case, clearly the amount of time needed to re-customize them can soar significantly.
Therefore, the level of template modification should be kept as low as possible.
