I have a client who needs to have their Joomla website version [url removed, login to view] upgraded to version 2.5.4. It needs to take place on Wednesday, April 18 between 8 p.m. and 12 midnight Greenwich Mean Time (GMT). The site currently has only two plug-ins: RSForms Pro and Akeeba Backup Core. They also want you to add JC Editor after the upgrade.
When you supply your quote, please provide specific details about the steps you will take to protect data, minimize the site's down time, and verify that everything is working properly after the upgrade.
Also, please indicate your prior experience with Joomla upgrades, since this is a particularly tricky upgrade path.