Hello,
My name is Ivan Vujisic, I'm 45, I have 8+ years VoIP systems development and maintenance, but also 10+ Linux/PHP/MySQL development.
Please check what my clients said about my work -> http://www.freelancer.com/u/ivan381eu.html and you will see almost all project are custom development related.
I can say I like your idea, sponsors pay, customers get "service" for free :)
Also, it's wise decision to go cloud, even more, I like your idea of proper backup of sponsors recordings at your place/office, so if something goes wrong with cloud you are safe :)
Anyway, let's discuss the project.
My time zone is GMT +1, but I often work in EST business hours, so looking forward to hearing from you.
Best Regards,
Ivan Vujisic (ivan381eu)