Have you found the natural feed forum here on RT? Lots of good information there. So much depends on what your goals are, what you have to work with, how many rabbits you're feeding etc. In general, growing your own feed takes more time and costs less. Grow out time is somewhat longer if you are raising them for meat.
Guess I don't understand why anyone would want to make their own pellets. What do you want to feed that you think would be better in that form?