Dreamcast Online Servers

Okay, I'm not sure if this has been discussed before as part of another thread, but even so, I think it should be made separate.

How feasible would it be to make our own DC servers for the games we play? If and when Sega cuts the plug that would essentially mean the end of the DC. However, if we can find a way to somehow keep it going, well, that would be great. Any info anyone?
I know that Barubary claims to have his own server for pso... Developing and stuff. I know it is possible... Money would be an issue though.