Multiple remote RDs with Windows Server foundation 2012R2?

I have a client who currently has 4 home workers simultaneously remotely accessing an SBS2003 server using terminal services.  The server needs to be replaced. I have been told that the Foundation version of Server 2012R2 will support simultaneous remote RDP access without having to by any additional licenses.

I have seen a lot of conflicting comments on the internet about this (including this site).  The spec for Foundation version states 'Maximum number of Remote Desktop Services (RDS) Gateway connections: 50' which implies you can do this 'out of the box' as it were.

There is no need for a Domain, thus no need for the Foundation Server to be a Domain controller (as I believe cannot be both a domain controller and support multiple RDS)

Is this correct?  Can I basically replace the current 2003 Server with a new server running the Foundation version of Server 2012 R2 with 4 simultaneous RDP connections using different user accounts?