Happy to share the response. It was only private because I was in a hurry and trying forums & support tickets...
I've cut & paste the 2 emails for Telerik with my further questions in between....
What you need is possible, but cannot be fully automated. You could create a reference Backend Services project and then duplicate it for each of your customers. The duplicate functionality only copies the structure (content types, fields) and does not copy any data. Each duplicate project will get its own API key and the data will be kept separately.
Unfortunately, this cannot be fully automated at the moment, meaning you have to manually duplicate the project from the UI. I am not certain if this is good enough for your solution.
Actually, the only missing part for the automation is the creation/duplication of the project. This is still not available as public API. We are planning to introduce it at some point. Once you have the project ready, you can use its master key for all administrative tasks related to it (initialize some data, etc.).
Let me know if you have any other questions, I will be happy to help.
Also, I'd like to offer our apologies for the late reply.
Thank you for your reply. This sounds fine and lack of automation not a problem since duplication copies structure :)
1. to create a 'reference Backend Services project', I'm assuming I just create a New Project (Hybrid/blank) and add a Backend Services Project to it with Cloud Data etc. and then reference that project as shown here: http://docs.telerik.com/platform/backend-services/rest/administration-api/projects/managing-projects . Could you confirm.
2. I can't see how to duplicate a project from UI. Could you just explain or provide links.
The steps are basically as follows:
You create an app from the Telerik Platform Web Portal.
You add a Backend Services project to it and set up everything the way you need - content types, permissions, cloud code, etc. You will use this project as a reference - you will duplicate it for every different customer(or business) you have.
Whenever you need to create a separate data store for a new business, you duplicate the Backend Services project created in step 2. You can find more about duplicating projects here.
I am not sure how you want to use the different projects in your mobile app. Are you going to have different mobile apps built for each customer(business) or one app that will be able to work with all the businesses?
In any case, duplicating the project will duplicate the structure and everything else you need and will give you a separate API key and data store. You can then use the API key for the business you want to work with.
Note, that if you need to make a change on the project structure at a later time you will either have to do it manually on all the duplicated projects or you will have to automate it through the API.
I hope this helps, let me know if you need more information.