Why don't you just use a cron job for this?
Why to use cron if the ACPI wakeup addon has a setting for this?
Because you don't need to bother with a whole plugin just for that. But, if the end result is the same then who cares how you got there I guess. My preference is to not make things more difficult or dependent than they need to be so for me I wouldn't bother with a plugin when my system already supports what I'm looking for.