Display Photos from MAC to Apple TV (1604993)

Basically I need an app that can stream photos from a designated folder on any number of connected Apple TVs on my network using AirPlay, I need for the app to refresh constantly the folder contents as photos will be added constantly to the folder and need to be displayed. If you’re capable of developing such app, please let me know what would be the price and how long it will take you to do it. Thank you so much