Hi TheAdminWannabe,
If your constraint is only regarding to Office Web Apps then Office 365 has already been launched my plans with having itself Office Web Apps with iPad and iPhone stable and consistent set up, refer to the Use Office Web Apps on your Android, iPhone, or Windows Phone.
For plan and pricing you can contact to Contact Support for a billing or subscription issue and Office community http://answers.microsoft.com/en-us/office/forum/office_2013_release-office_install?auth=1 .
Thanks,
Pratik Pandya