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. ... View more