Create a set of Holiday and Seasonal images / illustrations

Hi, We are looking to create a series of Holiday and Seasonal images that will be displayed on digital signs (LCD Monitors or TVs) in retail shop windows. The images will be used on their own or as base layouts where the customer can add their own text and graphics to suit their sale. We are looking to create a themed set to keep a general connected feel between the concepts. Each concept such as the ‘Seasons’ can match closely with just colour and text changes or they may be different but be easy identifiable as similar in style. There are 14 Concepts (such as Spring, Winter, Authum, Summer, Christmas, Easter, Valentine's Day...). There is an attached PDF that explains this in more detail.