Retail space comes in all shapes and sizes, with even internet retail requiring room for storage. A market stall is an excellent entry level retail opportunity, and often only requires a commitment of one day, or half day, a week. Popup shops, operating for a short time from a vacant property, are currently popular. Street cafes, offering a limited menu and often run from a parked van or other vehicle, are a gret way to test the market for a new restaurant venture. Small investments like a retail cart in a shopping centre, or a coffee van at a railway station, can offer good returns.