A hand weeder is a simple tool made from a bicycle wheel and iron rods. The hand weeder can be pushed by a person, is light and does not compact your soil. As it is rather technical and you will need someone to weld, it is best to take a technical leaflet with drawings to a local metal worker and explain how you want it made. You can also ask the artisan to make a ridge plough to be attached to the same standard frame. Better even is to show them this video.