The default options currently available are for single ad purchases or memberships which allow unlimited ads for a set period of time/price, but there are none as you have described. There are also no existing
AppThemes marketplace items to add this functionality, so it would require customization on your part if you were looking to add this to the theme. AppThemes does not offer customization services, however we do have a
certified partners page where you can find developers for hire. If you make contact directly with an outline of your requirements, they can provide a quote for the work. Thanks.