Tansu,
SAP did not released ERP 60 Ehp7 on HANA IDES version and upgradring/migrating IDES data wont be smooth.
Best option would be to use SAP HANA as sidecar scenario, integrate SAP HANA with your ERP instance, replicate data into SAP HANA and deploy HANA Live Content. This way you will reduce all efforts around any upgrade/migration and setup the SAP HANA quickly for implementing SAP HANA Live.
Hope this helps.
Regards,
Srinivas K