Data base architecture multi tenant or not?

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Basics question. 
I'm building an app for my own business. But I want to be able to sell the app to other simular businesses eventually. 

I'll have about 15 or even 20 database tables. 

If I want to make the app so that I can sell it in future. How do I structure the database in Xano?

For example do I effectively copy and paste the database tables in Xano to blank new ones and then build a custom version of the appgyver front end linking to the new tables for each new client? 
Each client will have their own Iist of users that they can add also.

Hope this makes sense.