Simple Heygen's video/audios

Hello, how are you? I need many hours of the "most simple" Heygen's avatar videos every month. I have a Heygen's account which i pay $29 a month and it allow me 200 minuts of videos. Acctually i do not need the avatar's nor the videos. Whenever i make my videos with Heygen I click on the avatar, delete it and render only the audio. The renderization is much faster and i only need the audios anyway. How much less than i am paying now would you charge me, provided i need about 600 minuts of audio per month? Depending on your price we could make a long term partnership. I make the audios of about 27 minuts each, the maximum allowed by Heygen is 30 minuts. I would need an average of "12 audios every month. It is 10 hours of audio a month" I send you the scripts and you render just the audios back to me. Thank you, Horacio A.