Wordpress custom coder: pay per play function for audio files

Hello – I’m looking for someone who can custom code or integrate the following feature into my Wordpress template. Please be sure you are familiar with Wordpress and are 100% able to accomplish the task before you apply for the job. Please don't waste our time and yours. The feature we want is: a "pay per play" of an audio file. Specifically, every time someone clicks on my audio file to play it, I’d like them to pay for it. I do not want them to be able to download it. At the end of the project, this must be completed: 1) a pay per play feature integrated into our Wordpress template (that is an ecommerce store). 2) this pay per play feature is: when our audio file is made available each time the customer purchases it and it will not allow the song to be downloaded into a user account 3) the audio file will be only available for a period of time that we can choose (for example 12 hours, 24 hours, 48 hours) 4) After this project is complete, we will be able to use this feature (eg we can upload audio files) on our own without further coding and it will remain a working feature on the site 5) visitors will be able to preview a short clip of the audio file. The play button for the sample must be right under the audio we're selling. We can set the time range of this audio file preview as well 6) this feature will be workable if we switch templates We'd like to get this project finished within 12 days. Regular updates need to be sent in the form of video. To ensure we've completed each of the 6 points, please make 6 videos (a recording of each of the 6 points). The time limit and videos are a part of the contract and mandatory for payment. Many thanks!!