DJ request messaging app development

I need you to develop some software for me. I would like this software to be developed for Mac. Before submitting your bid please include the total price, no extras after submitting bid. What we are looking to do is make a messengering application that can work between a Mac and a iPad, using Bluetooth between the two devices or over Wi-Fi. This should be a very simple messaging service, that will be used within the DJ Ing industry. For example, using an iPad participants at the event can request songs, which then will send the requested song straight to their Computer for them to go ahead and put in queue. Using the iPad, it will be a one-way system, which means you can only send messages from the iPad. Using the computer which will receive the messages it should only be a one way streak as well which is on the receiving end. I would like for the app within the Mac side to have a audible notification of incoming song requests. This Application must work with voiceover the accessible screen reader for Mac as well as the iPad. On the iPad, from where people would send their request all it should have his title of song and artist name if known or category of music. Please note at the current moment this is just a idea, that we would like to somehow integrate within our business. If you have other questions please message me and I will do my best to answer all questions. I would like for the application to be as basic as can be and no need to make it fancy.