I would like to request help building a farmbot prototype (farmbot.io), Canada-based. At the same time I am offering my skills and expertise to do the same. If you have some space, tools, a small budget and would like to put up with a tinkerer while he attempts to build something that is still in the prototype stage, then this may be for you.
The farmbot makes use of a Raspberry Pi 3, and Arduino Mega 2560, a planter bed, some track and a gantry to apply the principles of a CNC machine to seed, water and weed a garden in the range of 1.5m x 3m. Demonstrating that this works could prove useful for larger scale operations.