I have a client that currently has a Windows 2011 SBS environment with 20 workstations on the lan and another 5-10 remote offsite users. The 20 users with workstations on the lan use the RDP Gateway Service to remote into their personal workstations. The offsite users currently use Remote Web Access, however this no longer meets their needs and they wish to have an actual workstation environment/experience for these remote users without having a physical workstation in the office. They would need the same access to all shared files and resources just as if they were local users.
I have only used RDP for administrative purposes and have never had users RDP into the server directly and work so my question is what exact software/licenses do I require and what recommended hardware does this solution require.