terminal server to terminal server

Hi All

I am looking for opinions on the following request I have had from a client.

We use terminal servers to control access to client networks all the applications to manage the servers are installed on the terminal server.

The client would like us to access there network via there terminal server as well

I.E. workstation to terminal server to terminal server vnc/tivoli/rcd to server.

My opinion is that this is full of problems.

Your opinions and comments would be appreciated.