Using a Replication Subscription Database for Publication Hopefully, there's a very "simple" answer to this question: 


Can a SQL Server 2012 subscription database in a transactional replication setup also be used for publication?
Yes you can but not easy to maintain.  If your ever get out of sync and you have to reinitialize, resnap of the first set of publication and subscription; you will need to remove the publication property of the subscription. Otherwise you cannot do a full snapshot.