We have already quite some configuration within Jenkins. For safety sakes we should do a backup of the current state (see https://wiki.jenkins-ci.org/display/JENKINS/Administering+Jenkins) and save it to the owncloud.
We can also try out https://wiki.jenkins-ci.org/display/JENKINS/SCM+Sync+configuration+plugin which saves the configuration to a configuration management system. This actually looks really nice and easy to setup. I propose to try this out.