U have two options:
1- Build JGRO
2- Build Joes 2006
Both above plans are freely available on this site. Both machines are wooden (MDF).For JGRO it is so simple to cut MDF, whereas Joes2006 is a little bit complicated (as far as parts cutting is concern)...However you can buy the complete parts with reasonable rates from Joe.
You have to buy electronics+software from third party..
I built my first machine in metallic...whereas my second machine is in progress out of MDF..