Using a Corporate Enterprise Licence, I don't have access to BULK or SOAP API but only to REST.
It seems that the best way to do cost effective interfaces to external tables / files would be to use INFORMATICA free version of data loader.
But : - does it support bi-directional sync ? - does a bi-directional flow count for one end point or two end points (the free version is limited to two end points).
Thanks for you help.