Hello
I went through your proposal. Yes we can upgrade with out data loss. just let me know have you made any custamization to moodle, like theme, plugin, report. if you don't have any custamization,send me the Moodle & cpanel login details. I will upgrade.
Little bit myself:
I'm from an IT background, I have 3+ years of experience in Moodle administration, eLearning instructional designing & development. Currently working as Moodle administrator & instructional designer & developer, in an organisation called IPH & handling multiple courses on Moodle. I also provide Moodle training to clients.
For details about my services click on the link- [login to view URL]
Regards,
Harish