Beggars can hardly be choosers. At this rate, any homebrew MMORPG would be an incredible feat. The homebrewer would not only have to know how to do all the programming, game design, graphics, testing, etc, but would need to know a lot about networking, running a server, etc. Not only all that, but also he (they) would have to run that server 24/7.
It's unlikely, but still possible.