Installing a terminal server on an existing server

I have a Dell PowerEdge T410. I am wanting to add a terminal server that will be accessed by remote users however instead of buying an additional piece of hardware just to house the terminal server is it okay to installing terminal server services on my existing server to cut costs. Are there any differences in efficiency or security issues when installing a terminal server on an existing server compared to having separate servers for the files and a terminal server. Any information that can be provided would be greatly appreciated. Links to additional information supporting either way would also be great. Thanks ahead of time :)