I have been rendering for years with Vray for Rhino, from my laptop. My school, RPI, used to allow us VPN access for distributed rendering, but the adminstration does not maintain the system, so the only way to render is without textures (why render at all?). I have recently started rendering with Mental Ray on 3ds max, which will continue to work for several years outside of college because of the 3 year key.
In my thinking, I want to build my own render station. I have a budget of $2000. I have added a picture of my newegg cart, with options for gpu. Please let me know what you think!