Publishing from appliance to remove web server

Possible work flow:

1. user is defining its website account data (via webmin?)
- remote ftp and database data
- local website path and local database access data
2. after manual trigger or cron script is making tar package out of
- files in defined path
- defined databases
3. files are stored locally and coped to remote location (out of webroot)
4. local script is triggering remote script execution (via wget --> remote script placed in webroot)
5. remote script is backing up remote website+db and replacing it with new files