A lot more information is needed before we can advise you on how many cores will be needed.
I advise you to work with your SAS team to get a hardware estimate (i.e. Sizing) that will be based on not only the data file size, but how your 10 users will be using SAS.
The following paper has guideliness on initially sizing a SAS Installation.
https://support.sas.com/resources/papers/proceedings09/310-2009.pdf In addition the following link has useful resources https://platformadmin.com/blogs/paul/category/sas-software/sas-architecture/ .
A pieces of advice, based on the estimate of 10 users your install would not be big, try to keep it simple unless you have something very specific and are planning to hire a SAS Administrator (SAS programming and SAS adminsistration are related but distinct tasks). Linux as the server OS is my preferred choice.
The SAS Users Group for Administrators (SUGA) is open to all SAS administrators and architects who install, update, manage or maintain a SAS deployment.
Learn how to install the SAS Viya CLI and a few commands you may find useful in this video by SAS’ Darrell Barton.
Find more tutorials on the SAS Users YouTube channel.