How would it benefit the server:
This could be another grinding job to add a skill that would be known as farming.
You would farm melons, wheat, carrots, and potatoes. Maybe even cabbages.
You could use plots of grass areas around the map like behind the PD. Or you could edit the map a little to add a little area to use as a plot of land to use for crops. the land could cost like 10k for starting players and more for a richer player like printers are right now.
Potential Issues/Exploits: there are always bugs with new jobs... Nuff said.