Well drilling without a drilling rig

Went to a well drilling class last weekend. Taught me how to drill a water well with a hand drill. You can drill wells 40 to 100 ft deep. Its a new organization designing and building the equipment to take to 3rd world countries and teach them how to drill wells and set them up with the equipment they need to be able to start their own business drilling wells. I envision taking the equipment into the village I am working and drill wells for irrigation. I have been growing crops down on the river bed and in the height of dry season you could dig down 3 ft and have all the water you would need. We could drill shallow wells all along the river for irrigation during dry season and they could use the same wells for clean drinking water.