A good operator will stack seasonal items in their machines. St. Valentines Day pink teddies for your gal. The more enticing the prizes the more money you will make. Crane machines also require a yearly license. Smaller cranes can be placed in theaters, convince stores, bowling alleys, tavern's restaurants, ect.
Inventory is one of the drawback to cranes.
Unlike arcade games cranes machines require maintenance. If you decide to become involved in the crane industry you need to learn how to maintain and repair the machine.