SAP HANA XS advanced model use case and licencing

Hi,

Imagine the following setup:

1. HANA used as a database platform for both transactions and analytics to develop a custom application

2. HANA XS Advanced Model used as an application platform

3. No relation or connections to other SAP systems/products - ERP, etc. so we are talking about using SAP HANA as a pure technology platform to develop our custom functionality

4. Number of users is pretty substantial - around 2K concurrent, 10K total

Question:

1. Do I need to license anything in additional to the SAP HANA Platform (in 64GB memory blocks) from SAP - any kind of users, any kind of license for the XS stack?

I am new to HANA and SAP. Appreciate any help.

Thanks!

Alex