Think about what benchmarking is/does, etc.
If you benchmark servers, it provides a basis for comparing servers.
If you benchmark "sas" and other analysis programs/systems, it allows comparison of the systems.
If you want to size the hardware for a SAS environment, then you are back to benchmarking hardware, and simply noting the performance of the SAS processes of interest.
You can use the system options STIMER and FULLSTIMER to get some elapse time measurements for SAS processes, and the amount of memory SAS used for that "step".
If you want to design a new environment, then you need to step back and run through the design steps like I wrote earlier.
Minimally, for an effective EG environment, you need a Windows server to hold the metadata repository, a SAS server with appropriate database clients and drivers installed, BaseSAS, SAS/IT, SAS/Access for each database and PC files and SAS/GRAPH.
Maximally, you have the whole suite of stuff: EG, Web Report Studio, BI, all the SAS components, SAS MetaData Servers, SAN connections, Database Connections, multiple physical SAS servers, including test and dev, and more.
If you need help with this, then contact SAS and have them come out and access your business for BI, etc. After they leave, step back, take a deep breath, and look at what they say soberly. Remember, salesmen want to sell you the world, and all you may need is a cork screw.